Book of Monsters Slot (Pragmatic Play)
Provider: Pragmatic Play
Reviewed by: Chris Taylor
Book of Monsters Info
Pragmatic Play
Horror
96.5%
Very High
7x7
Cluster Pays
20p to £5
5,000x
23.2%
27 Mar 2025
Overview
Head on a spine-chilling adventure with Pragmatic Play’s Book of Monsters slot. Played on a 7x7 grid with Cluster Pays, you can play at slot sites from just 20p a spin.
Colourful and fun, land 5+ connecting symbols to form winning clusters. Randomly during base game spins, symbols can appear between 3x3 and 7x7 in size. Landing 4+ Bonus symbols will trigger the Free Spins feature with up to 8 free spins awarded. Then a randomly selected symbol is chosen to become the Fat symbol. You can gamble to increase the value of the Fat symbol or increase the number of free spins.
Once in, collect enough Fat symbols to increase the size of the Fat symbol, up to 7x7 in size. With each size increase, additional free spins are awarded. With a 96.5% RTP rate, Book of Monsters comes with 5,000 times bet max wins. Play the free version below as well as lots of slot demos at OLBG.
Book of Monsters Slot Demo
Play Book of Monsters slot for real money
- Wagering req. 0x
- Value/free spin £0.10
- Offer amount £10
#ad. 18+, gambleaware.org, T&Cs Apply
- Wagering req. 0x
- Value/free spin £0.10
- Offer amount 100
#ad. 18+, gambleaware.org, T&Cs Apply
- Wagering req. 40x
- Value/free spin -
- Offer amount £100
#ad. 18+, gambleaware.org, T&Cs Apply
- Wagering req. 35x
- Value/free spin £0.10
- Offer amount £52
#ad. 18+, gambleaware.org, T&Cs Apply
- Wagering req. 0x
- Value/free spin £0.20
- Offer amount £6
#ad. 18+, gambleaware.org, T&Cs Apply
Similar Slots
With a ‘Fat’ symbol that increases in size, Book of Monsters is similar to Push Gaming’s Fat Rabbit and Fat Santa. Both these games come with 10,233 times bet max wins which is more than double that of Book of Monsters.
Print Studios’ Royal Potato also sees the Jumbo Potato Wild increase in size up to 5x4 for max wins of 30,000 x bet. In the sequel, Royal Potato 2, there are more bonus features and up to 40,000 x bet payouts.
If you were expecting typical expanding symbols in the free spins like Book of Dead, check out OLBG’s guide to the best ‘Book of’ slots:
The Top 10 ‘Book of’ Slot Games
Want slots that are more frightening? Top horror-themed games in my guide to the best Halloween slots include titles based on serial killers, mental asylums, vampires, ghouls, supernatural rituals, demented clinics and twisted demons:
The Best Halloween Slots to Play in the UK
Book of Monsters Expert Review
Pragmatic Play Slots
Do you like playing Pragmatic slot games? With hundreds to play, I recommend the following slots which are popular amongst players:
- Sweet Bonanza: Played on a 6x5 grid with Scatter Pays, it’s all about Rainbow Bomb Multipliers which can reach 100x in the free spins. With a 96.49% RTP rate, there are 21,175 x bet max wins up for grabs.
- Gates of Olympus: With a Greek mythology theme, this Scatter Pays slot comes with tumbles, Orb Multipliers, free spins, a 96.5% RTP rate and 5,000 x bet max wins.
- Sugar Rush: Played on a 7x7 grid with Cluster Pays, this game is about the free spins where marked spots and multipliers remain on the grid and affect tumbles. With a 96.5% RTP rate, wins can reach 5,000 x bet.
- Big Bass Slots: With more than 20 Big Bass games, my detailed guide has details on games like Big Bass Bonanza and Big Bass Splash as well no wagering free spins offers.