Book of Inferno Online Slot

Published: 13 Feb 2023 | Updated: 14 Feb 2023
Published: 13 Feb 2023 | Updated: 14 Feb 2023
Game Provider
Maximum Win
Progressive Jackpots
Bonus Feature
Fantasy, Horror

Licensing Authorities and Testing Agencies

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Slot Setup and Betting Options

  • 5 Reels
  • 3 Rows
  • 3D Graphics
  • 07.02.2023 Release Date
  • Mobile Version
  • £0.10 Minimum Bet
  • £100.00 Maximum Bet
  • £0.01 Minimum Bet Line
  • £10.00 Maximum Bet Line
  • 10 Paylines
  • Win Both ways

Book of Inferno Online Slot Review

Take journey into the Underworld with the Book of Inferno slot machine by Quickspin. It’s a 5-reel game with 3 rows of symbols and 10 paylines that you can play on PCs, Android, iOS, and Windows mobiles.

Take this virtual journey to Hell and encounter devils, a demon slayer, and powerful book symbols. The book acts as others if needed to complete wins, and also unlocks a free spins round. Marked symbols will expand on their reels, and you get this feature at the start of the free spins.

Play the Book of Inferno online slot and you can win up to 5,846x the stake. It’s a high volatility game with a heck of a good return to players percentage of 96.15% at the best Quickspin slots uk casinos.

How to Play the Book of Inferno Online Slot

The richly detailed cartoon symbols include metallic card emblems, glowing demons, such as the Commander of Hell, Lady of Hell, and Lord of Hell, plus Anna the Demon Huntress. These characters sit in a 5x3 grid within a decorative frame covered in gargoyles against a backdrop of lava. It’s a dramatic scene, heightened by an ominous soundtrack. Look above the reels and you see all 10 symbols in a row, which becomes important if they become marked and expand to fill reels.

Both the desktop and mobile versions of the Book of Inferno online slot have the same easy to use controls at our recommended Betting Sites. You can pick form a bet range of 0.10 to 100.00 on each spin with a click on the pile of coins button. It equals 0.01 to 10.00 on each of the 10 paylines and if you tap the 3 small lines on the control panel you open a paytable that lists the relative value of each symbol.

You need 3, 4, or 5 matched symbols across a line starting from the left, helped by the book that can act as others if needed. It’s also the most valuable, paying 1x the stake for just 2 on a line, with 3, 4, or 5 books worth 10x, 100x, and 500x the stake respectively.

If you live outside the UK, there are a couple of extra options available, such as an automatic spins feature triggered by the circular arrows button, while the little hurricane starts the reels spinning in fastplay mode. You can also buy into the free games bonus for a one-off bet of 125x the stake.

Free Spins & Other Book of Inferno Slot Machine Features

Symbols can be ‘marked’ at any time. An impressive animation sees a flaming red pentagram appear on the reels and the book rises from it, turning pages to reveal a random symbol. This symbol is then highlighted on the meter at the top of the game, and any examples that land in the next spin will expand to cover all 3 rows of the reel.

This only happens if there are enough to create a win, although marked symbols don’t need to be on adjacent reels to pay a prize. If the book lands on the same spin, it upgrades the symbol to the next most valuable for a bigger win. In practice, this feature won’t always lead to a prize-winning combination, but it won’t harm your chances of a big win either.

The book is also the trigger for a free spins bonus round. Any 3, 4, or 5 in view at once will award 2x, 20x, and 200x the bet respectively, followed by 10, 15, or 25 free spins. More books in a single free game will retrigger the feature.

At the start of the bonus round, one random symbol gets marked for the duration, and it can upgrade at any point during the free games.

Slot Features

  • Bonus Buy
  • Multipliers
  • Scatters
  • Wild Symbol
  • Free Spins
  • Re-Spins
  • Quickspin
  • Gamble Feature
  • Retriggering

Book of Inferno Slot Maximum Wins, Volatility, & Average Returns

Wins can reach 5,846x the stake, or 584,600.00 at the maximum 100.00 bet. This vision of Hell is a highly volatile place, so expect relatively few winning spins countered by higher-than-average prizes. The return to players percentage is good at 96.15%.

Our Book of Inferno Slot Rating

The dramatic topic and impressive graphics will draw in many players, but the devil is in the detail, and we’re pleased to report that the gameplay and features are just as impressive as the looks.

It’s the marked symbols that make the Book of Inferno slot such a hit, with the book selecting symbols at random to expand and perhaps form valuable combinations, especially with the upgrades. We found this feature to trigger quite often, both in the base games and it’s always active during the free spins bonus round.

Will the Book of Inferno slot machine make its mark? Play it at the best Online Casino UK sites featured here to find out.


The Book of Inferno slot has 10 paylines. These run from the left reel to the right and you win a prize whenever enough examples of the same symbol land on adjacent reels. The wild book helps by standing in for others whenever possible.

The book symbol also marks other ones on random spins. This Book of Inferno feature sees the marked symbol stack across all 3 rows of any reel it lands on in the next spin. The symbol upgrades if the book also appears in the following spin.

Yes, it does. The book reveals a further power as it triggers 10, 15, or 25 free spins of the Book of Inferno slot reels when seen in any 3, 4, or 5 places. A symbol will always be marked at the beginning of this round and remains active throughout. The free spins retrigger with more books.

There’s no need to play the Book of Inferno slot at the maximum bet of 100.00 and you should only ever play casino games for fun with money that you can afford to lose. The minimum bet is only 0.10 per spin.

Yes, the Book of Inferno online slot is a game with a high level of volatility. That means comparatively few winning spins when compared to losing spins, but higher than average prizes to make up for it. The long-term payback percentage of 96.15%.

You can find the latest online casino promo codes here at Look for a code that covers the Book of Inferno slot to play it using the casinos’ money, not yours. However, we can’t guarantee that such a code will be available.

The UK Gambling Commission has rules in place that prevent residents of the country from playing online casino games such as the Book of Inferno slot for free. Freeplay versions are available in some other gambling jurisdictions.

The Book of Inferno slot is similar to games such as Charlie Chance in Hell to Pay by Play’n GO, Lil Devil from Big Time Gaming, and Devil’s Number by Red Tiger.

The Book of Inferno slot comes from Quickspin. This Swedish developer is also behind other popular games, including Sakura Fortune, Big Bad Wolf, Warp Wreckers Power Glyph, Dwarfs Gone Wild, and many more.

The Book of Inferno slot was released on 7th February 2023.

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With over 12 years of experience in online gaming, Adam has seen, played, reviewed, and tested hundreds of slot games. He is always keeping an eye out for new features, themes, and potential jackpots by testing slot games even before they are released to the market.