Book of Monsters
Pragmatic Play
Where to Play Book of Monsters
These licensed casinos offer Book of Monsters for play.
* Affiliate link. 18+. T&Cs apply. Full terms
Book of Monsters Review
Dive into a spine-chilling adventure with Book of Monsters for a chance to win up to 5,000x.Connect blocks of 5+ matching symbols to win prizes in the base game, where symbols of 3×3, 4×4, 5×5, 6×6, and 7×7 can randomly hit on any spin.Land 4-7 bonus symbols to trigger the feature with 5-8 free spins where a random symbol is chosen as the Fat symbol. Players can gamble for more free spins (up to 8) or a higher-paying Fat symbol before the round begins. During the feature, if enough symbols matching the Fat symbol land, the Fat symbol increases in size – from 1×1 to a massive 7×7 – awarding an additional 1-3 free spins each time it grows.What to expect: Symbols measuring 1×1 up to 7×7 can land on any spin in the base game Trigger the bonus game and gamble for more free spins and a higher-paying Fat symbol The Fat symbols can expand up to 7×7 as matching symbols land during free spins
How to Play Book of Monsters
Use the +/- buttons to choose your bet per spin. Bets on Book of Monsters range from £0.20 to £240.
Press the spin button to set the 7 x 7 reels in motion. Wins use a Cluster Pays system with 20 ways to win.
Land special symbols to unlock free spins, multipliers and bonus rounds. The top prize on Book of Monsters reaches 5000xx your bet.
Try it free first: click Start Demo above to play Book of Monsters with virtual credits, no account needed.
Book of Monsters RTP & Volatility
Book of Monsters has a Return to Player (RTP) of 96.50%. This sits right at the industry average of 96%, offering fair returns over long sessions. RTP is a theoretical long-term average calculated over millions of spins, not a guarantee for any single session.
Volatility: Very High. High-volatility slots like Book of Monsters can go through longer dry spells, but reward patience with significantly larger payouts when bonus features hit. Best suited for players comfortable with bankroll swings who are chasing big wins.
The maximum win potential is 5000xx your total bet. On a £1 stake, that translates to a top payout of £5,000.
Hit Frequency: Book of Monsters lands a winning combination once every 1 in 4.31 spins on average. Wins are less frequent, which is typical for high-volatility games with larger top prizes.
Book of Monsters Features & Bonuses
Book of Monsters by Pragmatic Play includes 5 notable features: Free Spins, Progressive Free Spins, Bonus Games, Cluster Pays, Hyperplay. These mechanics shape the gameplay and determine how bonus rounds are triggered and how wins are multiplied.
Bonus Buy available at 100x of your stake — instantly trigger the bonus round without waiting for scatters to land organically.
Book of Monsters Pros & Cons
- Strong RTP of 96.50%
- Huge max win potential (5000xx)
- Big win potential in bonus rounds
- Rich feature set with 5 bonus mechanics
- Free demo available, no sign-up required
- Can have long dry spells
- Bonus features may take time to trigger
