Menu
Browse
Best casinos
July’26Bonuses
Reviews
Slots
Free spins
Free spins by type
0$No-deposit FS Free
$+Deposit FS
↑No-wagering FS Best
🎁Free spins on signup
Popular slots
SBSweet Bonanza FS
SBStarburst FS
Guides
News
›On this page
Top 10 ranking
›Compare casinos
›How we rank
›Payment methods
›FAQ
›Editorial team
›★ See top bonus →
Showing offers for your region
Relax Gaming's Greek-myth "book slot" is a high-volatility title built around one headline number: a category-leading 99% theoretical RTP — roughly triple the value margin of a typical 96% slot. It runs on 5×3 reels with 10 fixed paylines, adds a 99-book collection meter as a second route into free spins, and caps out at a provider-stated 5,000× your bet (aggregator simulations model rare ceilings up to 12,075×, which is a simulated figure, not Relax Gaming's stated cap). Below you'll find our C$ Session Value Calculator and a straight answer on where Book of 99 is legal to play for real money in Canada.
Our slot scoring isn't a single hand-wavy number. We grade RTP and maths, volatility honesty, bonus design, feature depth, audio-visual craft and mobile — separately, with evidence, and with the editor's name on it.
Book of 99 dresses a familiar book-slot engine in Ancient Greek myth — Odysseus stands as the top premium, with Cyclops, Calypso and Kirki filling out the reels. Bold vector outlines, warm Mediterranean colour and tidy symbol art give it a clean cartoon identity that carries well on a phone.
The expanding-symbol reveal is where the presentation earns its keep. Before free spins begin, one mythical character is chosen at random; during the round it expands to fill its reel and pays across every position. It's a simple flourish, but it turns the bonus into the visual centrepiece of the game rather than a quiet add-on.
Where it shows its limits is originality. There's no cinematic intro and no elaborate particle work — the theme is well-worn book-slot ground executed cleanly. That's a functional, characterful build rather than a spectacle, which is why the visual & audio dimension lands at 7.8/10 rather than higher.
The base-game audio is understated Mediterranean pastiche — a soft lyre-flavoured loop and gentle percussion that suit the Odyssey theme. It's built for long, patient sessions rather than a wall of noise, and it never grates on repeat.
The soundtrack earns its keep as the 99-book collection meter climbs. Each banked book nudges the mix, and when the free-spins round opens and the random symbol expands, the audio lifts to underline the moment the top wins can land. Enter the bonus and the theme swells to match.
It is a modern 2021 mix, so the SFX are clean and well-balanced, but the audio is a supporting act to the collection meter and the expanding symbol rather than the headline. That's the right call for a high-variance value slot built around one feature.
The conceit is Homer's Odyssey in cartoon form: Odysseus, Cyclops, Calypso and Kirki across five reels. Underneath the familiar book-slot packaging sits a high-RTP, high-volatility engine built to give back 99% over the long run — the value, not a huge headline win, is the point.
The 99-book collection meter is the real hook. Every book and wild banks toward 99, and that visible progress creates a "sunk-progress" pull — the closer the meter climbs, the harder it is to walk away before free spins land. It reframes a plain book slot as something with a running goal.
For Canadian players it sits in a specific niche: a recognisable Relax Gaming name with the best RTP in its class, playable at low stakes. The C$0.10 minimum makes it easy to try, and the demo lets you feel the variance before you deposit — worth doing, because a High-volatility book slot plays very differently to its calm RTP number.
The first stretch of spins tells you what Book of 99 is: rated High volatility with a published hit frequency of 29.83% (one indicative source), so dry spells are real and the balance can slide before anything meaningful lands. This is not a calm ride despite the calm RTP.
The dividing line is the free spins, reached two ways: land 3+ book scatters on a spin, or fill the 99-book collection meter in the base game. When the round opens, one symbol is chosen at random and expands to fill its reel — that's where the top wins come from. It's a genuine idea, but retriggers aside it's a single feature with little variety.
The upside of the 99% RTP is long-run value — roughly a 1% house edge on turnover, about the best in slots. The downside is the ceiling: a provider-stated 5,000× cap (aggregator simulations reach up to 12,075×, a simulated figure, not Relax Gaming's stated cap) and no jackpot. It's a value game, not a max-win chase.
An 8.0 is a strong "recommended, with a clear profile" score. Book of 99 does one thing better than almost anything in its class — value — and asks you to accept high variance and a single feature to get it. Here's how each line item came together.
What pulled the score up: the maths. A category-leading 99.00% theoretical RTP means roughly a 1% house edge versus the ~4% of a typical 96% slot — genuinely player-friendly value. The volatility label is High and the game plays High, so the rating is straight with you rather than flattering.
What kept the score below 9: the bonus design (7.0) and feature depth (7.2). It is a single free-spins round built on one random expanding symbol; retriggers aside there's little variety, there's no bonus buy and no jackpot, and the provider-stated 5,000× cap is modest for a high-variance slot.
The decision. FOR — patient, RTP-aware players who play the demo first and bring a real reserve to ride the swings. NOT FOR — casual C$20 sessions, max-win chasers, and bonus hunters: a 99% RTP is exactly the sort of return many casinos exclude or weight-restrict from wagering, so it can void a deposit match. When the maths suits you and you're ready to play, see the best real-money online casinos in Canada.
Book of 99 is the value-hunter's book slot, not the biggest-max-win one. A category-leading 99% RTP and the 99-book collection meter keep the long-run value on your side — but the variance is High and the 5,000× cap is modest, so play it for the value and the meter, not a jackpot it doesn't have.
Most Ontario-licensed casinos offer a free Book of 99 demo (play-money credits, no sign-up, no deposit) so Canadian visitors can test this Greek-myth, Odyssey-themed slot instantly. The famous 99% RTP slot — try it free before you stake a single Canadian dollar. Below the stage: AGCO-registered operators that carry the game, with plain, non-promotional facts — always verify current terms at the operator.
Click to load the Book of 99 demo
Play-money credits · no download, no sign-up · 19+ (18+ in Alberta, Manitoba and Québec) · play responsiblyWe are clear about the limits of a hands-on check: a single session is far too small to derive a meaningful return figure. So below we report Relax Gaming's published numbers — the theoretical RTP and the one indicative hit-frequency figure — alongside qualitative notes from our own play, never a figure taken from a single session. The only RTP number we quote is Relax Gaming's theoretical 99.00%.
Pick a bankroll, a bet and a target session length. We apply Relax Gaming's 99.00% RTP as a flat 1% house edge on turnover — the long-run cost of putting money through the game, not a prediction of any single session. The edge applies to turnover (every C$ you wager), never to your deposit.
| Bankroll | Bet / spin | Raw spins | Expected house take |
|---|---|---|---|
| C$50 | C$0.10 | 500 | ~C$0.50 |
| C$100 | C$0.20 | 500 | ~C$1.00 |
| C$100 | C$1.00 | 100 | ~C$1.00 |
| C$250 | C$0.50 | 500 | ~C$2.50 |
Beyond the 99% RTP and the high-volatility label, what really matters is how Book of 99 feels to play. We break down the Book's dual Wild-and-Scatter role, the 99-book collection meter, the two free-spins triggers, the random expanding symbol that drives the top wins, and what the game deliberately leaves out — across six tabs.
In the base game the Book is the symbol that matters. It is both a Wild — substituting for every paying symbol to complete a line — and a Scatter that pays on its own and can launch the bonus. On top of that, every Book you collect during base spins is banked on the 99-book collection meter. That meter is Book of 99's signature idea: fill it to 99 and the free-spins round launches on its own, with no scatter spin needed. There is no bonus buy — the feature has to arrive in play.
Book of 99 gives you two routes into the same free-spins round. Path A is the classic scatter trigger: land 3 or more Book scatters on a single spin and you win 10 free spins. Path B is the added route that sets the game apart — fill the 99-book collection meter in the base game and the same 10 free spins launch, even on a spin with no three scatters. Whichever path opens the round, one mythical character symbol is chosen at random before the free spins begin to act as the expanding symbol.
The single feature Book of 99 leans on is the expanding symbol. Before the free spins spin off, the game picks one mythical character at random — Odysseus, the Cyclops, Calypso or Kirki. During the round that symbol behaves like the book in Novomatic's classic template: wherever it lands it expands to fill the whole reel and pays scatter-style across every position, not just left-to-right on a line. That is where the top wins come from, and why a lucky pick of a high-value character can turn a quiet round into the game's best result.
A few Book of 99 questions get glossed over elsewhere, so here they are plainly. Yes, the round retriggers: land 3 or more Books during free spins and you win 10 more. When the round is opened by the 99-book meter rather than three scatters, the game still selects a random expanding symbol for that round the same way — Relax Gaming describes a single bonus round, so the expanding-symbol pick applies however you got in. And if the 99th Book lands mid-spin, that spin resolves first and the free-spins round begins after it. Any doubt on the exact sequencing is worth a look at the in-game (i) panel, which spells out the active rules for the build you are on.
Part of reading a slot properly is knowing what is missing. Book of 99 carries no progressive and no fixed jackpot — the headline number is a theoretical maximum, not a pooled prize that ticks upward. There is also no published bonus buy: you cannot pay to jump straight into the free spins, and Canadian-regulated operators commonly restrict feature-buy features anyway. Beyond the single free-spins round there is no second bonus mode. None of that is a knock — it is why the game's value lives in its 99% return rather than in gimmicks.
Book of 99 is a light-hearted cartoon take on Homer's Odyssey. The reels are framed by a bright, storybook palette, with Odysseus as the top character symbol and the Cyclops (Polyphemus), Calypso and Kirki filling out the premium row. It is a 2021 build, so the animation is tidy rather than cinematic — the expanding symbol stretching across a reel during free spins is the moment that earns its keep. The soundtrack is a soft mythic theme that lifts as Books collect and the 99-book meter creeps toward a trigger.
Book of 99 runs on a 5×3 grid with 10 fixed paylines that pay left-to-right. Greek premiums pay from 2 on a line and the low royals from 3. Relax Gaming doesn’t publish a fixed public multiplier chart per symbol, so the table below is the payout-tier ranking plus each symbol’s role — open the in-game paytable panel for the exact ×. The Book is the symbol that carries the game: it is both Wild and Scatter.
We don’t print a per-symbol multiplier chart because Relax Gaming doesn’t release one as a fixed public figure — the exact × for each symbol shows in the game’s own paytable, so open the (i) screen before you stake. What is clear is the shape: the low royals (10 up to A) pay the least, the four Greek premiums pay more, and Odysseus is the top premium. The real upside sits in free spins, where the randomly chosen character expands to fill its reel and pays scatter-style across every position. On the ceiling: Relax Gaming states a provider cap of 5,000× your bet — about C$5,000 from a C$1 spin — while aggregators have published a simulated ceiling of up to 12,075× (roughly C$12,075 at C$1), which is a simulated figure, not Relax Gaming’s stated cap. There is no progressive or fixed jackpot: the maximum is a theoretical cap.
The catch with a 99% RTP slot: many casinos exclude high-RTP games from bonus wagering, or count them at a reduced weighting, so playing Book of 99 with deposit-match funds can slow — or even void — a bonus. Wagering (or playthrough) is simply the number of times you must bet a bonus before you can withdraw it, and Book of 99 rarely helps you clear it. Check the bonus T&Cs before you opt in. There is no bonus buy and no jackpot here — the value is the 99% RTP, not a bought feature. The examples below are generic AGCO-registered / Ontario-licensed offers; deposits and payouts run in C$ via Interac e-Transfer (the default), Visa/Mastercard debit or a regulated e-wallet.
Sentiment here is aggregated from major slot-review platforms and community forums, then cross-checked against an independent expert-review site (~4.5/5, July 2026). The recurring praise is the 99% RTP — players report it stretches a session further than a typical 96% slot — plus the 99-book collection meter as a fresh mechanic and the polished cartoon Greek-Odyssey visuals. The recurring gripe is variance: quiet, low-paying base spins and a 5,000× cap that feels far away. In short, sentiment matches the maths — value praised, variance the complaint. All feedback below is anonymised and paraphrased — source-type, date and rating only.
The recurring praise is the 99% RTP — players report it stretches a bankroll noticeably further than a typical 96% slot, so the same stake buys a longer session before the balance runs down.
The 99-book collection meter is singled out as a fresh mechanic — banking books toward a guaranteed free-spins trigger gives the base game a goal beyond waiting on scatters, which players find keeps a dry run engaging.
A common gripe is “dead”, low-paying base spins — long dry stretches where little lands, which reviewers tie to the game's high volatility rather than any fault in the payout engine.
Feedback is split: the maths and long-run value are respected, but several players find the base spins quiet between features and say the single free-spins round limits variety. Good value, thin on action.
The harshest reviews target the collection meter — the final books can take many spins with no tease pays, and a few players call the meter “deceptive”. The 5,000× cap is also felt to be well out of reach.
An independent expert-review site rated it around 4.5/5, praising the polished cartoon Greek-Odyssey visuals and Odysseus as the top premium symbol alongside category-leading value.
Facts change — RTP configurations can be adjusted at operator level, provincial rules evolve, and provider spec sheets are revised. We date-stamp every change to this Book of 99 review below, and each entry is initialled by the responsible editor.
July 2026: initial Canadian review published — full Book of 99 analysis with the C$ Session Value Calculator
Pre-publication fact-check and responsible-gambling review
This page version is v1.0, published 01 July 2026. Older versions, once they exist, will be archived in our internal CMS and can be requested for citation purposes by emailing [email protected]. Major updates trigger a fresh review; minor updates are factual corrections only.
Reviews are only as trustworthy as the people behind them. Below is the editorial team behind this Book of 99 review — reviewer, QA/responsible-gambling auditor and editor-in-chief — plus the affiliate disclosure that keeps our commercial relationships transparent.
Claire reviews online slots for Canadian players, focusing on what a game's published RTP and volatility actually mean for a bankroll. Her work centres on RTP verification and game-library analysis — she reads the provider spec sheet and the in-game paytable rather than leaning on a single short session. This review was tech- and QA-reviewed, and responsible-gambling checked, by Andrew Murray (Compliance & RG Auditor) and edited and signed off by David Clarke, Editor-in-Chief.
Disclosure. SlotsGamblers earns commission from casino operators when readers register through tracked outbound links — we may earn a commission from operator links. This commission does not influence the editorial score — the RTP, volatility, feature analysis and player-review sentiment stay identical regardless of any commercial relationship. Operators we point Canadian readers to are registered with iGaming Ontario and the AGCO, and any game scored below our recommendation threshold is flagged regardless of revenue potential.
Book of 99 is Relax Gaming's headline high-RTP title, so its natural peers are other 99%-class classics and book-style slots — plus one deliberately higher-variance guide for contrast. These are internal reviews and guides for Canadian players, not a rival top-10: just fair alternatives that suit the same value-first profile.
In Ontario, real-money Book of 99 is legal only at casinos licensed by the AGCO and registered with iGaming Ontario — the province runs Canada's open, regulated online-casino market. Everywhere else you play through a provincial platform: PlayNow (British Columbia and Manitoba), OLG.ca (Ontario), Play Alberta, Espacejeux (Québec) or Atlantic Lottery. Whether any given site actually carries Book of 99 depends on its live Ontario lobby, so check the game list before you sign up. The table below lists Ontario-licensed operators only; every operator link is a tracked affiliate link and we may earn a commission from operator links. Age 19+ (18+ in Alberta, Manitoba and Québec).
Before you deposit, a safe Canadian casino should tick five boxes: an AGCO / iGaming Ontario licence (or a provincial lottery platform); registration with your province's self-exclusion scheme; play and payouts in C$; transparent wagering terms with no hidden bonus conditions; and Interac support. Canadians aren't typically prosecuted for playing at offshore sites, but you give up regulator recourse, provincial self-exclusion protection and any payout guarantee — the practical reason to stay on licensed sites. If cash-out speed matters most to you, see our roundup of the fastest-paying Canadian casinos.
Real questions from readers, answered by Claire Wilson within 48 hours. No moderation beyond spam-removal — including critical questions about our methodology or operator picks.
Everyone quotes Book of 99 at a 99% RTP. Is that number actually real, or just marketing — and does it change from casino to casino?
It's real. 99.00% is Relax Gaming's single published configuration, and it's one of the highest theoretical returns in the whole slots category — a roughly 1% house edge on turnover, versus the 4–5% you hand over on a typical 96% slot. Two caveats. That figure is theoretical and long-run: Book of 99 is high volatility, so a short Canadian session can land well above or well below 99%. And an operator can in principle license a reduced build, so open the in-game (i)/paytable at your casino and confirm it reads 99.00% before you deposit — if it shows anything lower, that operator is running a cut-down config and you should pick another.
I've collected loads on the 99-book meter but it seems to crawl near the top. Why does the meter stall so close to 99 — is it rigged?
It isn't stalling by design — it's variance. Every book or wild you collect in the base game banks toward the 99-book meter, and reaching 99 awards 10 free spins on its own, with no scatters needed on that spin. But the last books carry the same odds as the first, so late in the count you can grind through many spins with no tease pays. That's the high-volatility maths, not the game slowing down or cheating you. Some players call the meter deceptive for exactly that reason; it isn't rigged — Relax Gaming is a registered iGaming Ontario supplier and the RNG is independently tested. Treat the meter as a slow-burn second route into the bonus, and size your stake so a cold run doesn't end the session.
Two things: is Book of 99 even on my Ontario casino, and once I'm in the free spins, can they retrigger?
On availability — regulators don't publish per-title game lists, so whether Book of 99 sits in your lobby depends on that operator's live catalogue; check the game list. LeoVegas' Canada-facing site lists it, and Relax Gaming is a registered AGCO / iGaming Ontario supplier, so it's cleared for the regulated Ontario market. On retriggers — yes: landing 3 or more books during the free-spins round re-triggers another 10 spins, and there's no published limit on how often that can chain. The expanding symbol chosen at the start stays fixed for the whole feature, so each retrigger keeps that same character expanding across its reel.
Play within your limits
Online slots are designed to lose more than they pay over time — even Book of 99's category-leading 99.00% theoretical RTP still leaves a structural 1% house edge over the long run. Gambling must stay entertainment, never a way to make money or recover losses. If it stops being fun, free, confidential help is available 24/7 right across Canada.
Warning signs to stop: chasing losses, betting more than you can afford, borrowing to gamble, hiding play from family, or gambling to escape stress. If any of these sound familiar, set a deposit limit, take a cooling-off break, or self-exclude using the tools below.
Must be 19+ to play in Ontario. The regulated market is overseen by the AGCO and iGaming Ontario, and registered operators must offer deposit and time limits.
ConnexOntario gives free, confidential support 24/7 by phone, chat or text for anyone affected by gambling.
Support is free and confidential right across Canada — you don't need to be in crisis to reach out or to set limits early.
The Responsible Gambling Council offers self-assessments, tools and advice on keeping play safe before things escalate.
Set deposit and time limits and take cooling-off breaks from your account, and use provincial self-exclusion to lock yourself out.
Outside Ontario, play runs through your provincial platform — PlayNow, Play Alberta, Espacejeux, OLG.ca or Atlantic Lottery — each with its own self-exclusion.
Gambling is for entertainment, not income. You must be 19+ (18+ in Alberta, Manitoba and Québec) to gamble in Canada. Set deposit limits, take cooling-off breaks, and never chase losses. The services above are free and confidential. If you or someone you know has a gambling problem, reach out today. When the fun stops, stop.
Real questions from search, player-review threads and our hands-on session — answered clearly in plain en-CA, with no marketing copy and no hidden T&Cs. Facts match Relax Gaming's spec: 99.00% RTP, a 5,000× max win and no jackpot.
Book of 99 is a Relax Gaming video slot on a 5-reel, 3-row grid with 10 fixed paylines, themed on Ancient Greek myth with Odysseus as the top symbol. The book acts as both wild and scatter — it substitutes and it pays.
Land 3 or more books for 10 free spins, or fill the 99-book collection meter in the base game to trigger the same round. Before free spins, one character symbol is chosen at random and expands to fill its reel. RTP is a category-leading 99.00% and volatility is High.
Regulators don't publish per-title catalogues, so availability depends on each operator's live Ontario lobby — check the game list. LeoVegas' Canada-facing site currently lists Book of 99, and other AGCO / iGaming Ontario-registered operators may carry Relax Gaming titles.
Outside Ontario, whether you can play it depends on your provincial platform. We link verified operators above, each via a tracked affiliate link.
Every book (wild/scatter) you collect in the base game banks toward the 99-book collection meter. Reaching 99 triggers 10 free spins regardless of how many books landed on that spin — a second route into the bonus alongside the usual 3+ scatters.
Before the round begins, one character symbol is chosen at random to expand across its reel and pay scatter-style. Confirm the exact behaviour in the in-game rules.
You can play it for real money at Canadian-regulated casinos. In Ontario the market is regulated by the AGCO and iGaming Ontario, and Relax Gaming is a registered supplier there; outside Ontario you'd play through your provincial platform.
Offshore sites also list it, but licensed play is the safer route — you keep regulator recourse, self-exclusion and payout protection.
At a 99.00% RTP the long-run house edge is about 1% of turnover, so wagering C$100 through Book of 99 carries a theoretical cost of roughly C$1 — not C$1 off your deposit on every spin.
High volatility means the real short-session range is far wider: you can lose most of a C$100 bankroll on a cold run or hit a big free-spins line. Use the session-value calculator above to model spins and risk bands for your own stake.
Individual players are not typically prosecuted for using offshore or crypto casinos, so that isn't the practical risk. What you give up matters more.
Off a regulated site there's no provincial self-exclusion, no regulator to escalate a dispute to, and no guarantee a withdrawal is honoured. That's the calm case for sticking to AGCO / iGaming Ontario-regulated operators.
The published theoretical RTP is 99.00% — one of the highest in the market and a single published configuration. Relax Gaming doesn't publish a lower-RTP variant.
Operators can in principle run reduced builds, so open the in-game (i)/paytable and read the active RTP shown there before you deposit.
Yes. Landing 3 or more books during the free-spins round awards another 10 free spins, and the round can retrigger again from there.
The randomly chosen expanding symbol stays in play for the whole round, which is where the top wins build.
No. The 99.00% RTP is the same whether you bet C$0.20 or C$100 a spin — stake size doesn't change the odds or the return.
Bet a level your bankroll can sustain across a High-volatility game. A bigger stake only makes the swings larger, not the RTP better.
Relax Gaming states a maximum win of 5,000× your bet — C$5,000 from a C$1 spin. Some aggregators publish a simulated ceiling of up to 12,075× (about C$12,075 at C$1), but that's a simulated figure, not Relax Gaming's stated cap.
There's no jackpot and no feature buy — the max win is a fixed theoretical cap.
Only real-money play at a licensed casino can pay out; the free demo pays nothing and is for practice.
Relax Gaming is an established studio — MGA-licensed and a registered AGCO / iGaming Ontario supplier, a positive trust signal. That said, no game guarantees a win on a High-volatility slot.