Technical Specifications:
Pragmatic Play developed Book of Monsters as a high volatility slot game that uses an innovative cluster pays system on a large 7×7 grid. Players earn rewards in this monster-themed game when they form a horizontal or vertical chain of at least 5 matching symbols instead of traditional paylines. The game presents a delightful assortment of monsters and card symbols which provide both entertainment value and the chance for big payouts that can reach 5,000 times your initial bet.
The central feature of Book of Monsters gameplay is its cluster pays system which requires players to form connected groups of no fewer than 5 identical symbols either horizontally or vertically. The random hit feature makes this slot particularly exciting because symbol blocks of various sizes (3×3 through 7×7) can appear randomly during any spin to create large wins.
The paytable reveals three monster symbols as the highest-paying icons with the red monster providing the greatest reward of $10,000 when 49 symbols connect. The maximum cluster of the green monster offers $1,000 while the purple monster at maximum coverage rewards $500. The card symbols (A, K, Q, J) represent the smaller payouts that range from $200 up to $400 when they complete an entire grid. The game utilizes a descending pay system that rewards symbol clusters with even modest 5-symbol groupings providing small payouts.
Book of Monsters features an innovative FREE SPINS bonus where players can win progressive FAT symbols. The bonus feature activates when a player receives 4 to 7 BONUS symbols which then produce 5 to 8 free spins based on the number of symbols captured. A random paying symbol becomes the special FAT symbol before each round starts.
The gamble option provided before the round commences makes this feature stand out as truly unique. Players can opt to gamble for both a more valuable FAT symbol and extra free spins. The gamble requires players to turn pages where they can uncover an improved symbol, additional spins or “THE END” which stops the gamble action.
The 1×1 FAT symbol materializes on the screen during each free spin and relocates to random slots. The game provides a random reward of 1 to 3 additional free spins every time the size increases which enhances the feature’s potential rewards. During this feature special reels with improved symbol distribution activate to increase the chances of winning.
Book of Monsters gives players extensive authority to customize their gameplay with its flexible betting mechanisms. The game offers a standard bet range that extends from $0.20 to $480.00 to cater to both conservative and aggressive bettors. For those seeking increased excitement, the ANTE BET feature provides two options: The free spins trigger requirement decreases to just 3 BONUS symbols with a 40x multiplier that makes the feature seven times more likely to activate, or use a 20x multiplier for standard gameplay.
The BUY BONUS feature allows impatient players to instantly start the free spins round at a cost of 100 times their total bet amount. The amount of initial free spins received is decided by the random appearance of 4, 5, 6 or 7 BONUS symbols when this feature triggers.
The game offers a steady RTP of 96.50% across all bets but its highest five-lightning volatility means players face significant risk for the chance of massive wins up to 5,000x bet cap. The free spins round ends instantly with the win given when the maximum win limit is reached while any leftover spins are lost.
Book of Monsters by Pragmatic Play delivers a monster-themed cluster pays experience on a 7×7 grid where connecting at least 5 identical symbols horizontally or vertically creates wins. The game’s highlight is its innovative free spins feature with a progressively growing FAT symbol that can expand up to full grid coverage, alongside random hit features and flexible betting options in a high volatility package.