Pragmatic Play Expands Its Slot Portfolio with Book of Monsters

Supersized Symbols and Expanding Bonus Mechanics Take Center Stag

Set in a dark, magical world filled with grotesque creatures and enchanted tomes, Book of Monsters invites players into a chilling adventure. The base game features cluster wins formed by connecting 5 or more matching symbols, with the chance for giant symbols—ranging from 3×3 to 7×7—to land randomly on any spin, dramatically boosting win potential.

Landing 4 to 7 scatter symbols triggers the free spins feature, awarding between 5 and 8 spins. Before the round begins, players can gamble to earn up to 8 total spins or upgrade to a higher-paying fat symbol. Once inside the bonus, a random symbol is chosen as the fat symbol.

As the feature progresses, each time matching symbols land and are collected, the fat symbol increases in size—from 1×1 up to a massive 7×7. Every growth stage adds 1 to 3 more free spins, creating a snowball effect that builds intensity and potential rewards throughout the round.

Key Features

• Cluster Pays: Form wins by connecting 5 or more adjacent matching symbols anywhere on the grid.
• Random Supersized Symbols: In the base game, symbols can appear in sizes ranging from 3×3 to 7×7.
• Free Spins Bonus: Triggered by landing 4 to 7 scatter symbols, with a gamble option for more spins or a higher-paying fat symbol.
• Growing Fat Symbol Mechanic: During free spins, matching symbols help grow the fat symbol, unlocking more spins and bigger wins.
• Maximum Win: Up to 5,000x your stake.

Bridging Innovation and Familiarity

While Book of Monsters introduces unique mechanics, it fits seamlessly into Pragmatic Play’s broader design approach—fast-paced gameplay with eye-catching visuals and engaging features. Following on from recent releases like Big Bass Return to the Races and 5 Lions Megaways™ 2, it reflects the studio’s continued momentum in delivering standout slot experiences.

Irina Cornides, Chief Operating Officer at Pragmatic Play, commented on the launch:

“Book of Monsters is an exciting and visually rich slot that can deliver supersized symbols on any spin and wins of up to 5,000x.”

The game reflects Pragmatic Play’s ongoing push for innovation, blending intuitive design with high-impact mechanics to appeal to a wide player base, and is quickly becoming a popular choice at most online slot sites.

Final Thoughts

With its monstrous visuals, escalating bonus feature, and evolving fat symbols, Book of Monsters is more than just another fantasy-themed slot. It’s a high-volatility experience packed with potential at every stage—whether during base game spins or the adrenaline-fueled free spins round.

Book of Monsters is now available across Pragmatic Play’s network of partner casinos and you can find more information about it here.