Book Of 99

Provider: Relax Gaming
9️⃣9️⃣ problems, but a slot ain’t one!

Book of 99 is a mythology-themed online Ontario slot from Relax Gaming. Coming in with numerous features including special spins with expanded symbols, this online slot comes with a coveted RTP of 99% and wins of up to 12,075x your stake!

Book Of 99

3 Number of Rows
0.1 Minimum Stake
10 Betlines
5 Wheels


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General Information

Book Of 99

Profit Information

Maximum Profit (x Your stake)


Maximum Stake
Minimum Stake

Book Of 99 review

Book of 99 is a mythology-themed slot launched by Relax Gaming on May 4, 2021. It quickly rose to prominence as one of the provider’s most popular games due to its RTP of 99%!

This makes Book of 99 one of the best high RTP slots in Ontario, and it only gets better when you consider its bonus features that include a wild collection mechanic and a special spins round.

Are you looking to learn more? Check what our Book of 99 review has to say.

Book of 99 relax gaming online ontario slot general

What You’ll Learn With Our Book Of 99 Review

We’re constantly testing new online slots in Ontario to ensure players can access the best games. To do so, we created a testing method that analyzes multiple variables, such as:

  • Slot symbols – We tested the game’s symbols regarding their payouts.
  • Betting options – We look through the betting options available and if there’s autoplay.
  • RTP – We compared the game’s RTP to similar titles.
  • Volatility – We verified if the reported volatility matches the provider’s claims.
  • Highest win – We look at the max win.
  • Slot features – We looked through the slot features and how they improve gameplay.
  • Special rounds – We checked if the game has a special round and how to trigger it.
  • Playability – We analyzed the slot’s graphical and sound quality.
Book of 99 relax gaming online ontario slot home

Book Of 99 – Symbols & Payouts

Like most online Ontario slots from Relax Gaming, Book of 99 benefits from well-designed symbols with generous payouts, fair RTP, and a high maximum win. Read the section below to learn more:

The symbols

Book of 99 is based on the mythological tales of Apollo, which inspire the symbols of this game. The high-paying symbols include Apollo himself, Pythia the Oracle of Delphi, a Cyclopes, and Lamia the half-woman and half-snake monster.

Low-paying symbols for Book of 99 are represented by the playing card symbols A, K, Q, J, and 10 as shown in Greek-inspired calligraphy with different coloured jewels.

Book of 99 all game symbols online slot ontario


The game has 10 paylines, starting from the leftmost reel. Only the highest-value combination per payline can trigger a win.

Min/max bet and autoplay option

Book of 99’s bets range from $0.10 to $100. There’s also an autoplay resource where you select a predetermined number of spins and set win, loss, and single-win limits.

Book of 99 RTP

Book of 99 has one of the highest RTP rates on the market, at 99%.


This top game by Relax Gaming is classified as being a high volatility slot.

Maximum win

The maximum win in Book of 99 is 12,075x your bet.

High RTP slots are always popular among players
Book of 99 is one of the most popular online slots due to its RTP rate. At 99%, it’s considered one of the best in the business.

Game Features

As with most slots from the “Book of” series, Book of 99 has simple gameplay with only two main features – Wild Collection and Special Spins. Keep reading to see what these features involve:

Wilds and other resources

Wilds are the game’s most important symbol. In addition to substituting all other symbols, Wilds also act as Scatters. Here’s what else it can unlock:

Wild collection

Book of 99 relax gaming online ontario slot collection meter

Wild symbols that land on the reels are collected in the meter located on the left side of the slot.

Once the meter reaches 99, players are instantly rewarded with 10 special spins with expanded symbols.

Special spins

Book of 99 relax gaming online ontario slot explanding symbols

Hitting 99 on the meter isn’t the only way to unlock special spins. You can also trigger the feature by landing three book scatters on the reels

Before the round starts, a symbol is picked to be the game’s expanded symbol.

Additionally, expanded symbols pay-all-ways, meaning you don’t need to land three or more symbols in the same payline to win.

Book Of 99 – Graphics & Sound

Relax Gaming is known for its beautiful graphics and immersive soundtrack. Book of 99 is a prime example of this, featuring detailed symbols and smooth animations. The Ancient Greek soundtrack further adds to the game’s immersion.

Optimized for Mobile👍
MusicAncient Greece
Special featuresWilds, Special Spins, Expanded Symbols
Book of 99 is loyal to the the tales of Apollo
We really enjoyed the theme selected for Book of 99. It is carefully executed with gorgeous designs while remaining faithful to the mythological tales of this Greek God. The game is a viable option for players searching for an outstanding graphical experience.

Solutions To Issues With Book Of 99

Here are the most common issues you can find while playing Book of 99 and how to solve them:

  • The game stopped running – We recommend restarting the game, so you can replay the last round. 
  • I can’t replay the previous round – If the replay feature is insufficient, you should contact your casino’s customer service team.

Play With The Highest RTP With Book Of 99

High-RTP slots are always a winning recipe, and Book of 99 isn’t different. The game’s wild collection feature is innovative, allowing players to trigger special spins even if they don’t land three scatters on the reels. 

Book of 99 also has highly generous symbols payouts of up to 500x per payline. On the other hand, it would be nice if the game had a higher number of paylines. Make sure to visit our Ontario casino reviews to see where you can play Book of 99!

Slots Like Book Of 99

Don’t forget to try these other top online Ontario slots:


Can I play Book of 99 in Ontario?

Yes. The game is available on multiple Ontario-licensed online casinos.

Is Book of 99 safe to play?

Yes. Relax Gaming slots are regularly evaluated by third-party organizations such as eCOGRA to ensure fairness. You won’t have issues playing this game at an online casino in Ontario.

How much can I win playing Book of 99?

The game’s maximum win is 12,075x your bet.

Does Book of 99 have a jackpot?

Book of 99 doesn’t have a jackpot feature. You’ll have to land the most valuable symbols to reach the highest prizes.

What is the RTP rate of Book of 99?

As the name implies, the RTP rate for Book of 99 is 99%.

What is the highest-paying symbol in Book of 99?

The male warrior is the most valuable symbol, paying up to 500x your stake.

Casino Content Manager
Antoine is the casino content manager responsible for the OntarioCasinos website. He has been writing engaging content for companies in the online casino industry for over 6 years. While he is not busy ensuring that Ontarions get the best casino online information, he is generally busy brewing beer and going on hikes.
Book Of 99


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