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Book of Monsters — slot review
Book of Monsters is a slot by Pragmatic Play (released 2025) with an RTP of 95.5%, high volatility. Theme: Halloween, Adventure, Monster.
RTP 95.5%High volatility7 reels
Free demo
Free, virtual chips only — no sign-up
Demo mode uses a virtual balance and pays no real winnings. It is meant for getting familiar with the game.
Specifications
| Provider | Pragmatic Play |
| Release year | 2025 |
| RTP | 95.5% |
| Volatility | High volatility |
| Reels | 7 reels |
| Paylines | fixed paylines |
| Theme | Halloween, Adventure, Monster |
Why the RTP at a casino may differ
Providers ship the same game in several return configurations, and each casino picks which version it runs. Across the market the spread typically runs 2–8 percentage points below the headline figure. The number here is the provider specification — the version actually running is shown inside the game, in its rules screen.
Book of Monsters review
Seven reels is a non-standard layout that only a couple of games in this sample use. Pragmatic Play released the slot in 2025 with fixed paylines and a theme combining Halloween, adventure and monsters. Volatility is high. On the numbers the game sits just under the catalogue average.
Where to play Book of Monsters
Top-rated casinos from our ranking that carry Pragmatic Play games in their catalog:
100% up to €100 on your first deposit (in the US — up to $1000 + 1000 free spins)
First-deposit welcome bonus + free spins (e.g. 100 FS on Gates of Olympus); terms vary by country
Similar Pragmatic Play slots
See also
This review was prepared by the Casino Atlas editorial team. Last updated: July 2026. Specs are based on provider data; the RTP version may differ at a specific casino.