Book of Monsters Demo
Book of Monsters Slot Review
Dive into a spine-chilling adventure in Pragmatic Play’s upcoming release, Book of Monsters!
Monsters are terrifying creatures we once looked for under our beds, but it seems Pragmatic Play’s latest creation is harbouring such things in Book of Monsters. The once scary creatures that hid under our beds are now portrayed in a lovable and friendly light.
Book of Monsters conjures wins through cluster wins, a popular mechanic that Pragmatic Play does well. Prepare to witness giant symbols between 3×3 and 7×7 fall onto the reels, along with Bonus Scatters that access the Free Spins mode. This game puts a fun and exciting twist on our childhood nightmares, delivering quality graphics, animations, and cutting-edge mechanics.
Continue reading our full Book of Monsters slot review for more insights into features, mechanics, statistics, and our overall opinion and rating!
Base Game & Features
Book of Monsters is a highly volatile 7×7 Video Slot, operating a Cluster Pays mechanic and varying bet sizes between £.€0.20 and £.€240 per spin. This game facilitates multiple RTP options between 96.50% and 94.50%. Other attributes include a sizable max win cap of 5,000x your bet.
Triggering winning clusters requires 5-49 matching symbols to land on adjacent reels/rows, either horizontally or vertically. In the base game, high and low-paying symbols can appear in sizes of 3×3, 4×4, 5×5, 6×6, or 7×7 across the grid. Although this game is a Cluster Pays title, it does not feature Cascading Reels.
Bonus Scatters
Bonus Scatters in the form of an Orange Alien can appear anywhere on the grid. Landing 4 or more Bonus Scatters triggers the Free Spins round. However, landing 3 Bonus Scatters awards a payout of 2x your bet.
Ante Bet & Bonus Buy
- Ante Bet: Each spin is 7 times more likely to trigger the Free Spins mode (2x your bet)
- Free Spins: Guarantees entry into the Free Spins round (100x your bet)
Free Spins
Landing 4, 5, 6, or 7 Bonus Scatters anywhere on the grid triggers the Free Spins mode, awarding 5, 6, 7, and 8 Free Spins respectively, as well as a payout of 5x, 15x, 50x, and 100x your bet.
At the start of Free Spins, a random high or low-paying symbol is selected as your Giant symbol for the entire feature. Before the round begins, you can Gamble your current symbol for a potential higher-paying one or additional Free Spins.
Choosing to gamble your giant symbol will result in the pages of a book turning over. If the next highest-paying symbol is revealed, the Gamble has been successful. Alternatively, if ‘The End’ is shown, the Gamble has been lost and you will return to the base game, empty-handed.
During Free Spins, a special Progressive Feature is activated. The round begins with a 1×1 Giant symbol present on the grid, moving to a new position with each spin. All instances of the giant symbol in view are collected into a special meter. When certain thresholds are achieved, the giant symbol increases in size:
- +30 Giant symbols: Increase the size to 2×2
- +27 Giant symbols: Increase the size to 3×3
- +24 Giant symbols: Increase the size to 4×4
- +20 Giant symbols: Increase the size to 5×5
- +16 Giant symbols: Increase the size to 6×6
- +12 Giant symbols: Increase the size to 7×7
Each time the Giant symbol increases in size, +1, +2, or +3 Free Spins are awarded.
Our Verdict
Book of Monsters has a lot of redeeming qualities, in particular the provider by which it was created. Pragmatic Play holds the record for the most releases, delivering a variety of lucrative games month after month. Book of Monsters joins over a dozen new releases from Pragmatic Play, offering interesting features and the ever-popular Cluster Pays mechanic.
At first, the base game can feel rather timid in comparison to many of its predecessors, but the idea of landing giant symbols in a size of 7×7 is an attractive aspect of gameplay. It’s a rewarding feature if you’re lucky enough to see it in action, but it could have been made better through the use of Multipliers.
Upon triggering Free Spins, you will have access to a nifty Gamble feature, which allows you to trade in your current Giant symbol or Free Spins for a higher outcome. Naturally, this type of Gamble comes with the risk of losing it all, but if you’re a daredevil player, you will find this a great addition.
In Free Spins, your Giant symbol is of particular importance as each instance is collected and added to the meter next to the grid. When enough instances have been collected, the active Giant symbol will increase to the next available size, similar to iSoftBet’s Morgana Megaways slot.
*Book of Monsters is available to play across Online Casino Sites from the 27th March 2025