Book of 99
Book of 99 is a high-volatility online slot from Relax Gaming with an RTP of 99.00% and a maximum win of 12,075x.
Ranked #2 of 100 highest RTP slots
- RTP
- 99.00%
- Volatility
- High
- Max Win
- 12,075x
- Layout
- 5×3
- Release Date
- 2021
About Book of 99
Book of 99 is an online slot from Relax Gaming, with high volatility, a published RTP of 99.00% and a listed maximum win of 12,075x.
RTP varies between casino configurations and markets, so check the information screen inside the version you are playing. A maximum-win figure is a theoretical ceiling, not a likely result. How these pages are researched and what the recorded play data does and does not show is set out in our editorial policy.
18+ only. Slot outcomes are random and past results do not make a win more likely — set a limit before you start.
Bonus features
- Triggering the bonus
Viewer experiences
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Where to play Book of 99
Book of 99 is in the Jack-pot lobby. New players: 200% up to 500 GBP + 100 Free Spins — on Book of Tut. Read the Jack-pot review →
Book of 99 FAQ
What is the RTP of Book of 99?
Book of 99 has an RTP (return to player) of 99.00%. RTP is the theoretical percentage of total stakes a slot returns to players over a very large number of spins, as published by Relax Gaming — individual sessions can land far above or below it.
How volatile is Book of 99?
Book of 99 is rated high volatility. High-volatility slots pay out less often, but wins tend to be bigger when they land — expect longer dry spells and larger swings to your balance.
What is the max win on Book of 99?
The advertised maximum win for Book of 99 is 12,075x. Max wins are extremely rare by design — treat them as a ceiling, not an expectation.
Who makes Book of 99?
Book of 99 is developed by Relax Gaming and was released in 2021.
What is the layout of Book of 99?
Book of 99 plays on a 5×3 grid with 10 paylines.
