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We evaluate slot machines based on multiple criteria, from which we make our final verdict.
Design and theme
96 %
Features and playability
94 %
RTP and volatility
95.4 %
Slot machine details and review Book of Spells
Enter the world of magic and sorcery with the online slot machine Book of Spells from the famous developer Tom Horn Gaming. Book of Spells is not just about spinning the reels – it is an expedition into the world of dark wizardry, where every spin can bring a reward hidden deep in a forbidden book. Get ready for a gloomy atmosphere, tension and the chance to win a real fortune. The whole game takes place on a classic 5×3 playing field and you will have only 9 paylines at your disposal. So it takes a little skill, but the reward will not miss you.
Every slot machine must be developed by a company that invented, designed and put it into operation. Many players eventually find that they only enjoy playing on machines from specific software provider, so they narrow down their selection by preferred brand.
What are the Cylinders or Reels on a slot machine?
Reels are the basic element of most slot machines and are columns of symbols that spin and stop on the screen gradually during the game. They are therefore the basic element on which symbols spin and on which winning combinations are formed. The most popular numbers of reels are 3 and 5.
Paylines on slot machines are imaginary lines that run through the reels of the machine and determine which combinations of symbols on these lines are considered winning. As the reels spin, players try to achieve winning combinations of symbols on these lines. Combinations must always start from the left. Each payline has its own payout value, and the winnings are determined by the paytable for each symbol on the particular machine. Modern slot machines can have hundreds of paylines, and players often have the option to choose how many of these lines they bet on.
9 paylines
Themes
Each slot machine has its own design or theme that appeals to a specific group of players. If you want to play slots with fruit symbols 🍉 or with an Egyptian theme 🐫, no problem. Just choose and we will narrow down the selection of slots to your taste.
😱 Horror
Layout
5x3
96.13 %
96.13 %
RTP of this slot
< 90 %
Small
95 %
Below average
96.5 %
Average
97.5 %
Above average
99 %
High
Small
Below average
Average
Above average
High
Slot theme and symbols
Book of Spells will impress at first glance with its dark, gothic design. The game takes place in the darkened daytime near a mysterious castle, where moonlight falls on old trees, a river and a gate.
The graphics are detailed, with a strong use of lights and shadows, which underline the mysterious and exciting character of the game. The soundtrack is not exactly elaborate – you can hear the wind and while the reels are spinning you will hear quite unpleasant music announcing the end of the reels.
During the bonus rounds, the music intensifies and increases the tension. Overall, the game feels like a well-staged fantasy scene from a dark wizarding school.
The card values 10, J, Q, K and A are classics in most slot machines. These symbols have lower payouts and mainly serve as fillers. High-value symbols are the witch, cauldron, glass and hat.
WILD symbols not only replace other game symbols, but also represent the most valuable symbol of this game. When 3 or more Book of Spells symbols land on the reels, a bonus round with 10 free spins is activated. Before the spins start, one special expanding symbol is randomly selected. This symbol can expand to cover the entire reel during the free spins – and importantly – the payouts are calculated independently of the paylines.
This mechanic can lead to some really massive wins, especially if the wizard or owl is chosen as the special symbol.
Book of Spells has a high volatility, which means that the wins don’t come often, but when they do, they have the potential to be really generous – especially in the bonus round.
With an RTP of 96.13%, it stays above average, which is good news for players looking for a balance between fun and returns.
Theme and Symbols Book of Spells
WILD / Scatter Symbol
Witch
Cauldron
Potion
Witches' Hat
Letter A
Letter K
letter Q
Letter J
Number 10
Special Symbols and Slot Features
3D
NO
Autoplay
YES
Free Spins
YES
Gamble Feature
NO
Locking Symbols
NO
Wild Symbol
YES
Win Multiplier
NO
Other features
Bonus Game
Other Features
Prize table
Symbol
Multiplier
2x in payline
3x in payline
4x in payline
5x in payline
WILD / Scatter Symbol
2x
20x
200x
Witch
10x
100x
1000x
5000x
Cauldron
5x
50x
500x
2000x
Potion
5x
25x
100x
750x
Witches' Hat
5x
25x
100x
750x
Letter A
5x
50x
150x
Letter K
5x
50x
150x
letter Q
5x
25x
100x
Letter J
5x
25x
100x
Number 10
5x
25x
100x
Our rating of the game
Book of Spells
The Book of Spells online slot is designed for players who love fantasy and dark wizardry, like high-risk slots with potentially high wins, appreciate simple but catchy mechanics, and are not looking for a plethora of modern features, but rather a pure classic with atmosphere. If you also like Book of Aladdin, but crave something with a darker and more magical feel, Book of Spells by Tom Horn is the perfect choice.
Overall rating of the game
96%
Editor's rating
0%
Rating of 0 players
Rate this game too
0%
How do we rate slot machines?
We evaluate slot machines based on multiple criteria, from which we make our final verdict.
Design and theme
96 %
Features and playability
95 %
RTP and volatility
96.13 %
Pros
Book of Spells online slot offers an impressive dark and magical atmosphere creating an immersive experience
A special WILD symbol increases the chance of winning and triggering the bonus round
Free Spins with Expanding Symbol is an interesting and exciting feature that allows for wins even outside of the payline.
RTP of 96.13% offers an average return to the player compared to other slots
High winning potential, especially in the bonus game
Simple controls and a clear structure are ideal for beginners or players who like simple gameplay
Strong visual and audio processing ensures detailed graphics and ambient music enhance the gaming experience
Cons
Winnings can be rarer, which may not suit players with smaller budgets
Only 9 fixed paylines offer less variability in the game, there is no option to adjust the number of lines
The low-value symbols are not thematic, they use classic card values (10, J, Q, K, A), which disrupts the magical environment a bit.
The random expanding symbol in the bonus can be weak, especially when it lands on a 10 or J, the winning potential in the bonus game is significantly reduced
It sticks to the traditional template without any significant improvements or added features, so it doesn't bring anything particularly exciting.
Bonuses to casinos where slots Tom Horn Gaming slots can be played
Rating
96%
How do we rate bonuses?
The overall bonus rating is determined based on several factors: the amount of the bonus, the company's rating, the ease of obtaining it, the players' rating and the conditions for obtaining the bonus.
Use the bonus spins offer at PlayOJO to get 50 FS on the Big Bass Bonanza slot. The minimum required deposit to activate the bonus is £10 and your spins can be played at the £0.1 chip size. Note that the bonus is not available for players from N.I. Irregular play may lead to the removal of rewards. All the OJO Rewards and Game Play policies apply.
Rating
93%
How do we rate bonuses?
The overall bonus rating is determined based on several factors: the amount of the bonus, the company's rating, the ease of obtaining it, the players' rating and the conditions for obtaining the bonus.
New UK-based customers only. You must opt-in & deposit £10+ via a debit card to qualify | Offer valid 7 days from registration | Welcome Bonus: 100% match up to £100 on 1st deposit. 50x wagering applies (as do weighting requirements) | Free Spins: Awarded on Centurion Big Money once you have staked £20 on any Games Global game. Spin value = 10p | No wagering requirements on free spin winnings
Rating
91%
How do we rate bonuses?
The overall bonus rating is determined based on several factors: the amount of the bonus, the company's rating, the ease of obtaining it, the players' rating and the conditions for obtaining the bonus.
18+. New Players Only. £10 minimum deposit. 100% up to a maximum of £200. The welcome offer can be activated only once. 30 calendar days to activate. 35x wagering. 60 calendar days from activation to complete wagering. The 100% bonus up to £200 will be paid out in 10% increments to your Main Account balance. Bonus balance is not payable. Any remaining bonus balance will be forfeited upon withdrawal. T&Cs Apply. BeGambleAware.org
Rating
89%
How do we rate bonuses?
The overall bonus rating is determined based on several factors: the amount of the bonus, the company's rating, the ease of obtaining it, the players' rating and the conditions for obtaining the bonus.
Automatically credited upon deposit. Cancellation can be requested. First Deposit Only. Min. deposit: £10, max. Bonus £50. Game: Rich Wilde and the Book of Dead, Spin Value: £0.10, Max Extra Spins:50. WR of 30x Deposit + Bonus amount and 60x Extra Spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the extra spin winnings and bonus amount or £5 (lowest amount applies). Spins must be used and/or Bonus must be claimed before using deposited funds.
Rating
88%
How do we rate bonuses?
The overall bonus rating is determined based on several factors: the amount of the bonus, the company's rating, the ease of obtaining it, the players' rating and the conditions for obtaining the bonus.
#ad. 18+. Gamble Responsibly. Gambleaware.org. New players only. Only UK players. Min Dep £20. Max Bonus Bet £5. Offer: 100% of 1st deposit up to £250 + 100 Yoo Spins on Starburst, Book of Dead, Fire Joker, Gonzo’s Quest, & Big Bass Bonanza respectively (first 20 credited on 1st deposit; rest credited at 07:00GMT at 20/day). Spins expire after 23:59GMT on day they’re credited. Winnings from each 20 spins capped at £50 & credited as bonus. Bonus funds expire after 30 days, are separate to Cash funds, & subject to 35x wagering of bonus + deposit amounts. Only bonus funds contribute to wagering requirements. Bonus funds can only be used on slots. Full Terms Apply.
Warning: Play and gamble responsibly | Gambling may be addictive 18+ | Underage gambling is an offence | When the fun stops, stop.
Use the bonus spins offer at PlayOJO to get 50 FS on the Big Bass Bonanza slot. The minimum required deposit to activate the bonus is £10 and your spins can be played at the £0.1 chip size. Note that the bonus is not available for players from N.I. Irregular play may lead to the removal of rewards. All the OJO Rewards and Game Play policies apply.
New UK-based customers only. You must opt-in & deposit £10+ via a debit card to qualify | Offer valid 7 days from registration | Welcome Bonus: 100% match up to £100 on 1st deposit. 50x wagering applies (as do weighting requirements) | Free Spins: Awarded on Centurion Big Money once you have staked £20 on any Games Global game. Spin value = 10p | No wagering requirements on free spin winnings
18+. New Players Only. £10 minimum deposit. 100% up to a maximum of £200. The welcome offer can be activated only once. 30 calendar days to activate. 35x wagering. 60 calendar days from activation to complete wagering. The 100% bonus up to £200 will be paid out in 10% increments to your Main Account balance. Bonus balance is not payable. Any remaining bonus balance will be forfeited upon withdrawal. T&Cs Apply. BeGambleAware.org
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Game typeSlot
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