Book of 99

Book of 99

RTP: 99%
Volatility: High
Max Win: 5000x
Released: 2021
Provider: Relax Gaming

Book of 99 Slot Review 2022: Giant Cyclops Roam Ancient Greece in this Relax Gaming Game

In the epic Book of 99 slot, Relax Gaming rewrites history with a first-of-its-kind 99% RTP! As the title suggests, Book of 99 is a “book of–style” game with an ancient Greece theme. Check out this slot’s gameplay and all other details before you play it for real money.
  • Interesting theme
  • Massive RTP
  • Free spins
  • Bonus features
  • Flexible betting range
  • Mobile-friendly
  • Big winning potential
  • Doesn’t have enough bonus features
  • Volatility might be too high for some players

Quick Info

ProviderRelax Gaming
Type of slotVideo
ThemeGreek mythology
Bet range$0.10 to $100
Max win5000x
Bonus buyNo
Bonus featuresYes (2)

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About the Book of 99 Slot in Detail

Book of 99 slots

The Book of 99 slot machine uses a classic 5-reel, 3-row design with 10 paylines. Players can bet from $0.10 to $100 credits per spin, which is ideal for all types of players and budgets.

Theme and Graphics

In the Book of 99 slot, players encounter mythological figures and creatures from ancient Greece, including giants and one-eyed Cyclops. The comic-style visuals complement a haunting soundtrack enhancing the slot’s mystery air. This monumentally-themed slot game sets its reels against night skies.

Symbols and Features

Book of 99 slots

You’ll find A to 10 low-paying symbols in the game, embedded in precious metals and crafted with gemstones. Four higher-value symbols accompany them. The characters from Homer’s Odyssey can be found on the reels alongside music which immerses you in the game.

The game has female daemons (monsters), one-eyed cyclops, and male and female characters. The most rewarding symbol is the male hero. Landing 2, 3, 4, or 5 on a payline will award you 1x to 500x your bet.

The book symbol serves a dual role in this game. It acts as a wild card, replacing all other symbols except the expanding symbol in the bonus round. Landing 3 of the same symbol on a single spin will trigger Free Spins. You get 10 free spins in this round, and when the game begins, one of the standard symbols appears randomly. This will serve as the special expanding symbol throughout the feature.

If a special symbol lands on the reel during one of those spins, it will expand to fill the whole screen. The expanding symbol can appear on all 10 paylines. Landing 3 or more wild symbols anywhere on the reels will trigger another set of 10 free spins.

Whenever a wild symbol appears, it is collected in the Collection meter to the left of the reels. Each wild adds to your treasure map. When you get 99, the free spins will begin. These can be expanded just like a standard trigger. Once you’ve played through your 10 free spins, the meter will reset, and you can begin collecting wilds again to reach 99.

RTP and Volatility

Book of 99 slots

The RTP of this slot stands at 99%, and it features high volatility. Meaning you can expect sizeable but infrequent wins.

Book of 99 Slot Review Summary

Book of 99 slots

While the design may not be outstanding, this game has all the features you anticipate finding in a ‘Book of’ title. It even comes with an added Collection feature. The Book of 99 is one slot that stands out from the crowd. With a 99% RTP rating, it offers players unparalleled value and fun.


Can you Play the Demo Version of the Book of 99 Slot?

Yes, you can play the demo version of the Book of 99 slot online at any Relax Gaming casino.

Does the Book of 99 Slot Offer a Progressive Jackpot?

No, the Book of 99 slot does not offer a progressive jackpot.

Does the Book of 99 Slot have a Bonus Buy Feature?

No, the Book of 99 slot does not have a bonus buy feature.

Is the Book of 99 Slot a MegaWays Slot?

Book of 99 by Relax Gaming is not a MegaWays slot. Instead, it’s a video slot with 10 paylines.

Is the Book of 99 Slot Mobile-Friendly?

Yes, the Book of 99 slot is mobile-friendly.