Book of 99 RTP and Slot Overview

Title Book of 99
Return To Player 99%
Provider Relax Gaming
Grid 5×3
Paylines 10
Max Win 12,075x
Bet Range 0.10/100
Volatility High
Jackpot No
Release Date May 2021

Book of 99 is the latest Book-of themed slot that grabbed our attention. What’s so special about this game? Of course it is the incredible RTP of 99%, something we’ve never seen before. On top of that, this innovative game is developed by Relax Gaming, and it offers the high quality standards of production the innovative studio got us used to.

book of 99 basegame

Read our full review and find out all you need to know about one of the games with the highest RTP ever. On top of this hard-to-believe 99%, this new slot has a lot more to offer. Stunning graphics, a great UX from all devices and a nice Free Spins feature. Let’s dive into it.

Play Book of 99 for fun in free play demo version

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Bet Range and Paytable

book of 99 paytable

Book of 99 explores one of the most popular themes in the world of online slots. It all began with Book of Ra, which created the grounds for many more famous games to come, like Book of Dead and Book of Gems. This time the book-of theme does not go back to the time of Pharaons. On the contrary, the characters of this game are the ones of Ancient Greece.

Lower paying symbols are royals from 10 to Ace, while four characters compose the range of special symbols. The Greek hero is the highest paying one, paying 50x the stake for a combination of 5. Special Symbols here are the Book-of-99 Wild, which substitutes all symbols but the scatter (more about this symbol later). The book also acts as a scatter; land 3 or more of those anywhere in view for triggering the free spins feature.

Wild Collection

What makes this game interesting, on top of its 99% RTP, is the Wild collection system it has in place. On the left side of the reels you see a collection meter.

Every time you land a Wild symbol, the meter will increase by +1. Once you reach the top of it, with 99 Wild symbols collected, then you will trigger the free spins feature!

Free Spins Feature with Expanding Symbol

book of 99 free spins

In this game the free spins feature is triggered in two ways, both connected to the Book-of-99 Wild symbol. The traditional way is when the Book symbol acts as a scatter; landing three or more of those anywhere in view will trigger the feature. The other way is collecting 99 Wild symbols and fill the collection meter, as we’ve just seen above.

When you get lucky and trigger the feature, you will be awarded 10 Free Spins. Now, something special will happen. One of the symbols will be randomly selected, you will see it appearing on the upper left side of the reels. This is the expanding symbol, which will expand on the reels every time it is in view. This way it’s going to be much easier creating winning combos with high payoff during the feature.

Our Verdict

big win

Book of 99 is a very well produced game developed by Relax Gaming, one of our favourite slot providers. It is a simple book-of themed slot with 10 paylines, nothing like Megaways™, Infinity Reels™ or Megaclusters™ slots.

We like Book of 99 exactly because of its simplicity and for the incredible attractiveness of it 99% RTP. The book-of theme is developed with high-quality standards typical of Relax Gaming, creating a fantastic look and feel. On top of being visually appealing, the slot offers perfect User Experience from all devices. Few special features, like the Wild collection and Free Spins with Expanding symbols contribute to creating a very good gaming experience.

Book of 99 Slot – F.A.Q.

You can safely play Book of 99 and many other innovative slots in trustworthy online casinos picked by our team of slots experts. You can have a look at our New Slots Sites page and see which one offers the best casino bonuses for playing the games you love.

This game offers Wild Collection and Free Spins with Expanding symbol.

The special thing about Book of 99 is, indeed, its Return to Player of 99%.

This innovative slot is developed by Relax Gaming.

In this fantastic slot, bets range from 0.10 to 100, while max wins are capped at 12,075x.

Other slot by Relax Gaming

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