Betting
Betting
Gambling

Book of 99 Review 2026 – RTP, Demo, USD Betting Guide

Book of 99, known for one of the highest RTPs in slot history, has even more to offer than just generous returns over millions of spins. In this guide, I dive into the game’s rules, where to find the demo, and why you should care, plus some tips on how to navigate the high volatility.

Shannon Hundermark
S.H.

Last updated: 2026-02-12

Chad Nagel

9 minutes read

SportsBoom offers honest and impartial bookmaker reviews to help you make informed choices. While we may earn commissions through affiliate links, our content remains independent and free from promotional influence. For more information, see our Content Transparency and How We Review pages.

Book of 99 Review

Book of 99 Review

Featured Casino

Roostino
4.3/5
BONUS: Get 100% Up To €500 + 200 Free Spinsget bonus
Payout %
97.89%
No. of Games
10981
Detailed Product Info
DB Bet
4.2/5
BONUS: First Deposit Bonus Up To €100get bonus
  • Impressive bet types and depth
  • live in play betting
Detailed Product Info
betandyou logo
4.1/5
BONUS: Get Up To €1500 + 150 Free SpinsGet Bonus
Payout %
99.5%
No. of Games
786
Detailed Product Info
Full T&Cs apply 18+
1xBet Logo
1xBET Review
4/5
BONUS: Get 100% Bonus Up To $175Get Bonus
Payout %
96%
No. of Games
4500
Detailed Product Info
Full T&Cs apply 18+
22bet logo
22BET Review
4.2/5
BONUS: Welcome package up to €1500 + 150 Free SpinsGet Bonus
Payout %
95%
No. of Games
2000
Detailed Product Info
Full T&Cs apply 18+
1Bet
1Bet Review
4.2/5
BONUS: Get Up To €500 & 100 Free SpinsGet Bonus
Payout %
98.96%
No. of Games
4600
Detailed Product Info
Full T&Cs apply 18+
Rocket Play
4.2/5
BONUS: Get 100% Up To €100 + 100 Free Spinsget bonus
Payout %
%
No. of Games
Detailed Product Info

Best Global & Canadian Casinos for Playing Book of 99

  1. LeoVegas: LeoVegas is licensed in Ontario and features a massive library of 4,000+ games, including a dedicated "Book of Slots" section. Almost all of their slots are available in both real and demo mode. They do offer a welcome bonus of up to $1,500 and 100 free spins, but Book of 99 is excluded from wagering.

  2. BetMGM: BetMGM offers a premium casino backed by the MGM Resorts brand. They’re known for their MGM Exclusives and, even more so, their generous rewards program, where players can exchange their rewards points for wagers on exclusive offers for dining, stays, and entertainment.

  3. Stake: This is the go-to choice if you prefer to transact online with crypto. Unfortunately, Ontario is not supported just yet, but Stake does already serve the rest of Canada with a VIP program that rewards high-volume play with rakeback, weekly boosts, and monthly bonuses that scale as you climb the tiers. 

Book of 99 Review

Slot Developer

Relax Gaming secured its AGCO license in Ontario in 2022 and legally expanded into the regulated iGaming sphere in Canada, where they’ve now become a big name in reputable casinos like BetMGM. Their high-RTP titles are also verified by independent auditors like eCOGRA, so you can trust that their promise of higher-than-average returns is legitimate. 

Slot Theme and Story Line

Unlike the generic Egyptian sands of most Book slots, Book of 99 is more of a Greek odyssey, where the main hero navigates a new land where monsters and magic reign free. As you land Wilds, you collect books to trigger the empire's bonus round.

Reels, Rows, Paylines

The entire game plays out on a 5x3 grid with 10 fixed paylines. Like most traditional slots, symbols must land on adjacent reels, starting from the leftmost reel, in order to pay out. 

RTP & Volatility

The 99% RTP is the headline feature of this slot because it’s among the highest in the world. But don’t think for one second that that means it’s an easy ride. The volatility is high, so you will experience long dry spells where your bankroll dips. Fortunately, those usually come to an end with massive payouts.

Betting Range

Canadian players can spin from around $0.10 up to $30 per spin, but these limits can vary from one operator to the next. 

Max Win Potential

You can win up to 5,000x your total stake in the base game if you fill the grid with Apollos. Then the total feature win can reach 12,075x through retriggers and expanding symbols in the bonus round.

Graphics & Sound

The hand-drawn Greek art is sharp, so the high-paying hero symbols really stand out from the dark grid and background. Where things fall short for me is the soundtrack. It feels eerie and builds as you near that 99th book, but it doesn’t quite get me excited, so sometimes I’m inclined to hit mute.

Pros and Cons

Pros

  • 99.00% RTP = one of the highest in Canada

  • The book collection mechanic guarantees a bonus

  • Includes expanding symbols during free spins

  • Free spins can be retriggered 

Cons

  • The 99-Book Collection can take a while to complete

  • The 99% RTP often excludes the game from bonus wagering

Game Symbols and Payouts

Special Symbols

The Book acts as both the Wild and the Scatter. Here’s how that works: 

  • As a Wild, it substitutes for any of the regular symbols to help you complete a winning line.
  • As a Scatter, it instantly triggers the free spins round when you land 3 or more of them anywhere on the grid (they don't need to be on a line). It also pays out its own prize when it acts as the Scatter based on your total bet:
  • 5 Books: Pays 200x your stake
  • 4 Books: Pays 20x your stake
  • 3 Books: Pays 2x your stake

Regular Symbols

The paytable features four characters (Greek heroes and monsters), who actually pay out if you land just two-of-a-kind. You need at least three of the lower-value card royals to see a return. Here’s how much each symbol combination pays as a multiplier of your chosen stake:

Symbol5 of a Kind4 of a Kind3 of a Kind2 of a Kind
Apollo500x100x10x1x
Oracle200x40x4x0.5x
Cyclops / Lamia 75x10x3x0.5x
A / K15x4x0.5x-
Q / J / 1010x2.5x0.5x-
Sportsboom Event Table Logo

Book of 99 Demo Version and Free Play

I don’t ever recommend diving into a high volatility slot with real cash until you take the demo for a test drive. Some top Canadian sites like LeoVegas offer free play, where the real trick is using the demo to mimic your actual bankroll rather than betting fake millions. 

If you plan to deposit $100, treat your demo credits as such and set your stake to $0.50 or $1 just as you would in a real session. This will reveal how those dry runs are actually going to eat through your funds, which will even give you some insight into how many spins you need to budget for to trigger that 99-book collection.

Book of 99 Bonus and Key Features

Free Spins via Scatters

Free Spins via Scatters.jpg

Free Spins via Scatters

The fastest way into the free spins round is through 3 or more Book symbols anywhere on the reels in a single spin. This combo triggers 10 free spins and pays out a scatter win of up to 200x your stake. 

You can also retrigger another 10 free spins if you’re lucky enough to land another 3 Books before the round ends. There isn’t a limit on how many times you can retrigger, which is exactly how you chase that 12,075x total feature cap.

The 99-Book Collection Meter

The 99-Book Collection Meter.jpg

The 99-Book Collection Meter

If you aren’t coming right with the Scatters, the Collection Meter on the left of the grid guarantees a feature drop – it might take longer to get there. Every single Book Wild that hits the reels during the base game fills this meter by one point. Once you hit 99 Books, the game automatically launches the free spins bonus.

Special Expanding Symbols

The game randomly selects one regular symbol to become the special expanding symbol before your 10 free spins begin. This symbol expands to cover all three positions on its reel when it lands during the bonus.

These expanding symbols pay out like scatters, so they don't have to be on adjacent reels to pay. You just need a 3-of-a-kind for a payout. Here’s where you can hit the 5,000x single-spin max win if you land a high-value hero like Apollo as your expander and happen to fill the screen.

How to Play Book of 99 for Real Money

  1. 1

    Adjust your bet using the plus and minus arrows between $0.10 and $30. 

    Book of 99 for Real Money Playing Guide

    Book of 99 for Real Money Playing Guide

  2. 2

    Watch the book collection meter. 1-2 books on the reels on a single spin build your collection, but 3+ triggers the bonus.

    Book of 99 for Real Money Playing Guide

    Book of 99 for Real Money Playing Guide

  3. 3

    Hit the spin button to start the game or set up autoplay if you’d prefer to play hands-free.

    Book of 99 for Real Money Playing Guide

    Book of 99 for Real Money Playing Guide

  4. 4

    Your expanding symbol will automatically cover every reel it lands on once you get into the bonus round.

    Book of 99 for Real Money Playing Guide

    Book of 99 for Real Money Playing Guide

Mobile Play Experience

Book 99 lets you customize your mobile experience to the full extent with settings like the separate toggles for sound effects and music, which I find convenient when I want to listen to a podcast on a different tab while I play.

If you’re a regular to the game, you can also choose to skip the splash screen and intro movie on subsequent launches to cut down loading time.

You can also play hands-free with autoplay, and there are a few auto-stop settings you can use to protect your profits, including a loss limit, win limit, and single-win limit. Oddly enough, though, I found that autoplay as a whole is only supported at some casinos – probably because older versions of the game exist. 

Book of 99 Expert Tips & Strategies for Winning

  1. Don’t start a session if your bankroll can’t survive the trek to 99 books. Much of the game's long-term value is locked in that guaranteed collection bonus. Rather, opt for a lower volatility game when you’re on a tighter budget.

  2. The collection meter awards free spins with an eventual payout based on the weighted average of the bets used to collect each Wild. So, the trick is to keep your bets consistent from the get-go. Swapping from $1 to $0.10 stakes mid-cycle will drastically lower your bonus payout.

Book of 99 Alternatives

  • Book of Dead by Play'n GO: This is the most iconic Book title I can think of, with a traditional Egyptian theme. Its 96.21% RTP is lower than Book of 99’s, but it offers familiar high-volatility action through expanding symbols.
  • Money Train 4 by Relax Gaming: A western-themed title that used a Hold & Win bonus with an insane 150,000x max win – a “slight” brag towards most other non-jackpot titles.
  • Marching Legions by Relax Gaming: This one is perfect for players who stick to games with high RTPs. It’s Roman-themed with a 98.12% return and a similar collection mechanic. There aren’t any expanding symbols, though. 

SportsBoom Suggests – Is the Book of 99 Worth Playing?

It’s hard to find a reason not to, honestly. Book of 99 is a strategic choice due to its industry-leading 99% RTP and guaranteed bonus route. The only time I’d say it probably isn’t the best pick is if you’re coming in with a small bankroll that can’t accommodate at least 150 or so spins without a win. 

I suggest you start with a conservative stake and step that up once you’ve got some house money to play with.

FAQs

Can I play Book of 99 in Canada?

Yes! Book of 99 is available at most established operators in Canada, including BetMGM, Stake, and LeoVegas (where you can find the demo as well).

What is its RTP and volatility?

The extremely high RTP of 99% is paired with a high volatility rating, meaning you can be sure of one thing: respectable long-term returns, with a few dry spells along the way.

What’s the max win potential?

You can win up to 5,000x your stake in the base game or 12,075x through retriggers and expanding symbols in the bonus round.

What bet range is supported in USD?

Bets typically range from $0.10 to R30 per spin, but the exact limits you play with are determined by the casino you play at. 

Shannon Hundermark
Shannon Hundermark Casino & Sports Writer

Shannon Hundermark is a dedicated iGaming and sports writer who aims to give readers information they can genuinely use. Her work has appeared on platforms such as Business2Community and Gamblingsites.com, where she combines hands-on knowledge with careful research to produce balanced reviews and practical guides.

Slot Site Reviews