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RTP
96.00%
Max win
20,000×
Ways to play
8
Max-win odds
1 in 50k
BOOK is a Helio labs slot on Stake Engine with 96.00% RTP and a 20,000× max win. Play the BOOK demo free above with play money — no deposit and no account needed. It has 8 ways to play, from the base game up to epic at 500× your bet, and each one's exact odds are broken down below. For real money, BOOK is available at Stake.
Every way to play
8 modes · tap one to explore its odds
Cheapest route to the 20,000× max: Feature Spin (75×) — about 3.8M× your bet staked per hit on average, vs 25M× on epic (500×).
Base game
Base game · 1× your bet per spin · A normal spin at 1× your bet.
RTP
96.00%
Max win
20,000×
In profit
6.2%
Pays nothing
80.0%
Odds explorer
Pick a payout and read the exact chance, straight from Engine's provably-fair outcome table.
Reading the outcome tables…
Demos use play money. Maths computed by circus.fyi from Engine's published provably-fair tables — every outcome a mode can produce and how often, nothing sampled.
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BOOK demo — questions
- Can I play the BOOK demo for free?
- Yes. The BOOK demo on circus.fyi runs the real game from Stake Engine with play money, so you can try every feature without a deposit or an account.
- What is the RTP of BOOK?
- BOOK has an RTP of 96.00%, which means it pays back that share of every amount staked over the long run.
- What is the max win on BOOK?
- The max win on BOOK is 20,000× your bet. The most likely way to land it is Feature Spin (75× per round), where it hits about 1 in 50,000 rounds.
- Does BOOK have a bonus buy?
- Yes — BOOK has 6 buy options: Super Enhancer at 10× your bet; Feature Spin at 75× your bet; Regular at 100× your bet; Super bonus at 250× your bet; Epic at 500× your bet; Mystery at 250× your bet.
- How often does BOOK pay?
- In the base game, 6.2% of spins pay back more than they cost and 80.0% pay nothing. These figures come from the full outcome table, not a simulation.
- Who makes BOOK?
- BOOK is made by Helio labs and was released on Sep 17, 2026. It is published on Stake Engine, so its outcome tables are provably fair.
- Where can I play BOOK for real money?
- BOOK is available for real money at Stake. Use the "Play at" button on this page to open it at the casino you prefer.