Book of 99 Demo
Book of 99 is a Relax Gaming online slot built on 5 reels with 10 paylines. It returns a 99% RTP on high volatility. Check its RTP and volatility against the provider average before playing it for real money.
Game facts
- RTP
- 99.00%
- Volatility
- high
- Reels
- 5
- Paylines
- 10
- Provider
- Relax Gaming
About Book of 99
Book of 99 is a Relax Gaming slot you can try in free-play (demo) mode at most licensed casinos, and often on Relax Gaming's own site — the same math model and reels as real money, with no deposit needed to test it. 99.00% RTP puts it in the top tier of the catalog — a house edge of just 1.00%. The game runs high volatility — rare but heavy hits; budget 200+ spins to see the bonus round.
If you plan to play it with a casino bonus, check the personalised EV matches below — the simulation uses this game's real RTP and volatility, not a site-wide average.
Relax Gaming has 30 slots in our catalog, averaging 95.96% RTP across the titles with a published figure. At 99.00%, Book of 99 ranks #1 of 30 Relax Gaming slots by RTP — one of the studio’s most player-friendly math models. Browse the full Relax Gaming catalog for alternatives with a similar house style.
Personalised for Book of 99 · 99.0% RTP · high volatility
Best bonuses to play Book of 99 on
FAQ · Book of 99
What is the RTP of Book of 99?
Book of 99 has a published RTP of 99.00%, i.e. a long-run house edge of 1.00%. Some operators license reduced-RTP versions — check the paytable in the game info menu before playing for money.
Can I play Book of 99 for free?
Yes — Book of 99 has a free-play (demo) mode in fun credits at most licensed casinos, and frequently on Relax Gaming's own site. The math model is identical to the real-money version; you don't need to deposit to test it, but you do launch it from the operator, not from this page.
Is Book of 99 a high or low volatility slot?
Book of 99 is rated high volatility — rare but heavy hits; budget 200+ spins to see the bonus round. That makes it a poor fit for clearing wagering requirements on a thin bankroll — variance can bust you before the playthrough completes.
How many reels and paylines does Book of 99 have?
Book of 99 plays on 5 reels with 10 paylines. The layout is identical in demo and real-money play.
Which bonus should I use to play Book of 99 for real money?
Right now our simulator's best match is HappyJokers (200% up to €1000 + 75 Free Spins) at +€117 EV on a €100 baseline — recomputed against this game's RTP and volatility on every build.
