Base Game: A Mysterious Cave of Wins
Book of Monsters by Pragmatic Play is a 7x7 cluster slot developed by Pragmatic Play, featuring very high volatility and a maximum win of 5,000x your bet. Instead of traditional paylines, the game rewards players for forming clusters of five or more matching symbols.
The Fat Symbol mechanic plays a key role in the base game, with randomly oversized symbols appearing to boost winnings. Although there are no wilds, the Ante Bet feature increases the chances of triggering Free Spins.
Book of Monsters has an RTP of 96.50% and operates on a cluster pays system, making it an exciting choice for players who enjoy high-risk, high-reward gameplay. Bets range from a minimum of €0.20 to a maximum of €240.00, catering to both casual players and high rollers.
Slot Features: Free Spins, Fat Symbols, and Bonus Buys
Free Spins Feature
Landing 4, 5, 6, or 7 scatter symbols in the base game awards 5, 6, 7, or 8 Free Spins respectively. If the Ante Bet is activated, the requirement lowers to 3 scatters, granting 4 Free Spins instead.
Fat Symbol Mechanic
At the start of the Free Spins round, a random pay symbol is chosen as the Fat Symbol. This special symbol expands and moves across the grid, increasing in size as players collect matching symbols. The growth sequence is as follows:
- Level 1: Starts as a 1x1 symbol
- Level 2: Expands to 2x2 after collecting 30 symbols
- Level 3: Expands to 3x3 after collecting 27 more symbols
- Level 4: Expands to 4x4 after collecting 24 more symbols
- Level 5: Expands to 5x5 after collecting 20 more symbols
- Level 6: Expands to 6x6 after collecting 16 more symbols
- Level 7: Expands to 7x7 after collecting 12 more symbols
Each time the Fat Symbol increases in size, 1 to 3 additional Free Spins are awarded.
Gamble Feature
Before the Free Spins round starts, players have the option to gamble for:
- A better-paying Fat Symbol
- More Free Spins
However, if the gamble fails and the book reveals "The End", the Free Spins round is lost.
Bonus Buy Option
Players can instantly trigger Free Spins by purchasing the feature for 100x their bet. The game then randomly awards 4, 5, 6, or 7 scatters, activating the Free Spins round accordingly.
Conclusion: A Unique Twist on the “Book of” Genre
Unlike traditional Book of… slots, Book of Monsters introduces a fresh gameplay mechanic with its Fat Symbol expansion and cluster pays system. The slot offers high volatility and a max win of 5,000x, making it a thrilling choice for risk-takers. With its mysterious theme, engaging bonus mechanics, and gamble feature, this game is sure to captivate players looking for a monster-sized adventure.
Fun Fact: The “Book of” Evolution
Despite its name, Book of Monsters is not a classic “Book of” slot. Instead, it combines elements from other popular games like Reactoonz and Fat Rabbit, offering an innovative take on the genre.
