Book of Monsters: New Pragmatic Play Slot with Colossal Symbols and Cluster Pays

Pragmatic Play, a leading iGaming content provider, has launched Book of Monsters, a novel slot experience blending familiar mechanics with fresh twists. Steering away from the traditional “Book of” theme with expanding symbols, the slot features books as icons that can open and reveal free spins and randomly selected characters. While the chosen symbols expand during the bonus round, they align more with Fat Rabbit’s cascading mechanics than with Book of Dead’s reel-filling approach.

Not Your Ordinary Horror Theme

Book of Monsters goes against the grain with its lighthearted take on monsters. Far from menacing, the mythical creatures sport oversized eyes and mischievous grins reminiscent of Reactoonz’s playful aesthetic. The reel-dwelling creatures nod to classic horror motifs but soften the atmosphere with cheerful designs.

Built on a 7x7 grid, the title uses a cluster-pays system where wins trigger when five or more icons of a kind connect vertically or horizontally. The highly volatile slot can pay up to 5,000x the stake for a 49-of-a-kind cluster. Base bets range from $0.20 to $240, which double when the ante bet is active.

Fat Symbols and Scatters

Book of Monsters has no wilds, but the base game can reveal colossal symbols from 3x3 to 7x7. Each covered 1x1 tile pays as a single icon. The slot also features scatters that trigger five, six, seven, or eight free spins when it hits four, five, six, or seven of the icons, respectively.

Before the free spins round, a random pay symbol is selected as a colossal symbol for the bonus spins. A gamble game also activates for a chance at a more valuable symbol or an increase in free spins. Up to eight freebies can be awarded from the bonus game.

Free Spins and Progressive Bonus

The free spins round in Book of Monsters plays with a progressive feature linked to a colossal symbol. The icon covers a 1x1 tile at the start of the round and roams to a new position every round. All instances of the special character not overlapped by the colossal symbol are collected by a meter. Once 30 icons accumulate, the symbols level up to 2x2; collecting more can increase it to 7x7. Each symbol size increase adds one to three bonus spins.