Thinking about giving Book of Monsters a spin? We tested it thoroughly so you know what to expect. Built by Pragmatic Play, it lands as a slot with a medium high-variance maths model and 95.5% RTP. Expect a hit frequency around 29.84%, which sets the rhythm of play. Top wins are capped at 5,000x your stake, a healthy ceiling worth chasing. You get 7 reels and a familiar payline structure, all finished with a clean, modern look. But is it actually worth playing? Read on.
Written by Sophie Williams · Last updated: February 2026
Book of Monsters comes to us from Pragmatic Play, wrapped in polished, characterful visuals. It runs on 7 reels and a familiar payline structure with a medium high volatility profile, and 95.5% RTP.
Dig into the bonuses and Book of Monsters starts to stand out. Look out for scatter symbols that unlock free spins and extra bonus rounds. Its medium high variance balances steady wins with the odd larger payout. On balance, Book of Monsters is a no-frills option worth a few spins in the demo first.
At 95.5%, the RTP is slightly below the industry average of ~96%. While this is typical for many popular slots, players should be aware of the slightly lower theoretical return.
Medium-high volatility means wins come less frequently but tend to be larger when they hit. Players should be prepared for dry spells between bigger wins, requiring a moderate bankroll.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Book of Monsters features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
2.9 / 5 — Average
Book of Monsters by Pragmatic Play provides a straightforward slot experience. While it may not break new ground, it offers medium high volatility gameplay that will appeal to certain player preferences.