Play Book of Monsters Game at Prime Slots

Book of Monsters by Pragmatic puts a playful twist on the cluster-pay grid slot format. Set inside a monster-filled cave, the reels feature colourful, Reactoonz-style creatures and card-suit symbols. The action unfolds on a 7x7 grid, with wins created by clusters of five or more matching symbols. The base game is straightforward, but random Fat symbols, ranging from 3x3 up to 7x7, can appear unexpectedly. Activate free spins with scatter books to receive a special Fat symbol that grows by collecting matching icons, unlocking extra spins as it expands. This high-volatility slot has an RTP of 96.5%, and offers a chance at a maximum payout of 5,000x your stake. Book of Monsters is mobile-optimised, allowing you to enjoy its quirky cave theme anywhere. Remember to play responsibly.