Book of Monsters Slot (Pragmatic Play)

3.1 / 5

Provider: Pragmatic Play

Reviewed by: Chris Taylor

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In this review: summary

Overview
Similar Slots
Pragmatic Play Slots

Book of Monsters Info

Provider:

Pragmatic Play

Theme:

Horror

RTP:

96.5%

Volatility:

Very High

Reels:

7x7

Paylines:

Cluster Pays

Bet Range:

20p to £5

Max Win:

5,000x

Hit Frequency:

23.2%

Release Date:

27th 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

Bet £20 Get 100 Free Spins

Wagering req. 0x
Value/free spin £0.10
Offer amount £10

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New customers only. Deposit and wager £20 on Midnite Casino to get 100 Free Spins at 10p per spin, valid for 7 days on selected games. T&Cs apply. 18+ GambleAware.org
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120 CASH SPINS on Big Bass Bonanza

Wagering req. 0x
Value/free spin £0.10
Offer amount 120

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First deposit only. Min deposit and stake £20 on slots only. Promo code BASS120 required. Max 120 cash spins. Max one claim during promo period. Spins valid on Big Bass Bonanza. Total spin winnings capped at £200 per claim.Full T&Cs apply.
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100% up to £100 Welcome Bonus

Wagering req. 40x
Value/free spin -
Offer amount £100

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#AD New customers only, min deposit £10, wagering 40x, max bet £5 with bonus funds. Max bonus is 100% up to £100. No max cash out on deposit offers. Welcome bonus excluded for players depositing with Skrill or Neteller. Cashback is cash with no restriction. Full T&C’s apply. +18, Please Gamble responsible. GambleAware.org
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100% welcome bonus up to £50 + 20 free spins

Wagering req. 35x
Value/free spin £0.10
Offer amount £52

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18+. New players only. 100% First deposit bonus up to £50: Min deposit £10. Wagering: 35x deposit amount to unlock as bonus cash. Bonus balance not playable until wagering is met. 20 Free Spins on Big Bass Splash (no wagering). Free spin winnings credited to cash. Expiry: Bonus balance 90 days; Free Spins 2 days. T&Cs apply
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Spend £10, Get 30 Extra Spins on Monopoly Paradise Mansion

Wagering req. 0x
Value/free spin £0.20
Offer amount £6

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New members only, must opt in. Min £10 deposit & wager. 30 day expiry from deposit.18+. Free Spins: on MONOPOLY Paradise Mansion. 1p coin size, max lines. Bingo: Advertised ticket value based on £1 tickets. Game availability & restrictions apply. GambleAware.org. #Ad
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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:

ALSO READ 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:

ALSO READ The Best Halloween Slots to Play in the UK

Book of Monsters Expert Review

Theme & Symbols

Bonus Features

Max Win (5,000x)

Sounds & Music

RTP (96.5%)

Originality

Pragmatic Play Slots

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