Play in Book of 99™ slot by Relax Gaming for free now | SlotsJudge

Book of 99™ slot by Relax Gaming

Play for real
Software Layout
RTP 99.0% Jackpot Game
Release Date 04/05/2021 Slot lines 10 Volatility High Scatter Symbol
Technology JS, HTML5 Slot reels 5 Max. win 5,000x Wild symbol
Min. bet €/£/$ 0.1 Free spins Symbol Stacked Slot types
Slot Theme Ancient civilizations Max. bet €/£/$ 100 Bonus game Multiplier
Play for real

Book of 99™ Bonus Features

Game Symbols

In this Greek odyssey, you will find a group of unpaid symbols: Ace and King pay up to 15x if you land five, whereas Queen, Jack, and Ten pay up to 10x, Jack pay up to 10x your bet.

The higher-paying characters are the Baby Eater Monster Lamia – up to 75x your bet, Cyclops – up to 75x too, as well as female protagonists up to 20x and male protagonists up to 50x. The book is a special Wild symbol that pays nothing, rather substitutes for all symbols except the special expanding symbol in Free Spins.

Book of 99 online slot - big win

Bonus Rounds & Free Spins

Free Spins Feature

As always, you need the Book to activate the best moments of the gameplay. Not only is this Wild, a substitute symbol for completing prize combinations, but Scatter – 3 or more gives you a round of 10 free spins, but without additional payments, which is a little unusual. Before the start of the bonus round, one of the standard symbols is randomly selected as an Expanding symbol for the duration of the feature.

Finally, let's take a look at the next feature, the Wild Symbol collection system. For each Wild symbol landed in the base game, the scale near the playing field is increased by 1 time. Filling the counter with 99 collected Wilds will earn you a round of 10 free spins. The launch takes place according to the same rules, so Expanding symbols come into the feature.

Book of 99 online slot - free spins

Book of 99™ Pros & Cons

A well-developed theme of ancient Greek mythology, combined with attractive bonus features, does the trick, and the gameplay attracts you in just a few minutes.


  • Very high RTP of 99%
  • Collecting Wild Symbols feature
  • Free spins round


  • High volatility
  • A hackneyed theme


A very volatile action takes place on a classic playing field, consisting of 5 reels and 10 ways to win. Bets can be set from 0.10 coins to 100 coins on any device. Starting on the first reel, bonus combos are generated when matching symbols are placed next to each other on a payline. On the playing field, you will find a group of 10-A characters and higher-paying characters, including the heroes of ancient Greek mythology: Lamia, the Cyclops, as well as the main female and male characters.

Book of 99 online slot


The appearance of the slot is great for such a theme, and the bonuses are quite good. We would like to say about the main advantage – RTP. We opened our eyes wide when we saw such large numbers. Well, the provider is countering the downward trend by blessing a new slot machine with 99% RTP. Call it what you want – a tricky move or a gimmick to attract players, but at the end of the day, it's a feature that makes Book 99™ more desirable than many “Book” slots.

Where Can I Play This Slot?



New casino

CookieCasino Logo



  • Not all payment methods are available for all countries
  • VISA
  • MasterCard
  • Trustly
  • Skrill
  • PaySafeCard
  • EcoPayz
  • NeoSurf
  • Neteller
  • + 1 More
  • Instadebit
Players from United States

Similar slots


What is the maximum win I can get?

In this new slot machine, the maximum theoretical win is as much as 5,000x the stake!

Can I get the Free Spins feature?

Three or more Book symbols give you a round of 10 free spins. Also, for each Wild symbol landed in the base game, the scale near the playing field is increased by 1 time. Filling the counter with 99 collected Wilds will earn you a round of 10 free spins.

Can I play in the Demo version?

Yes, you can get acquainted with the slot machine for free by launching it in the Demo version.

Does the slot have a progressive jackpot?

No, there is no progressive jackpot in this release from Relax Gaming, but you can compete for it in other slots from the same company.

Read all slot reviews or write your own!

Overall rating

Based on 0 reviews
Rating: 0/10
There are no reviews to display!
Log in or sign up to leave comment or rate slot