Slots Like Book Of Inferno: The Ten-Tile Symbol Ladder and a 5,846x Ceiling
Book Of Inferno is Quickspin’s descent into the underworld, a 5×3 book slot with ten fixed paylines, a 96.15% default RTP and a maximum win of 5,846 times your stake. Stakes run from £0.10 to £100. What separates it from the rest of the format is the ladder of ten symbol tiles above the reels: one paying symbol is marked, it expands to fill its whole reel when enough copies land, and every Book that drops shunts that mark one step higher, climbing the six card ranks and then the four infernal characters until it reaches Anna herself. Volatility is high, rated five out of five on Quickspin’s own scale, so the base game can feel thin for long stretches. If you are hunting slots like Book Of Inferno, the closest company keeps the same ten-line skeleton and the same willingness to make you wait.
Where to Play
18+ only. T&Cs apply. Please gamble responsibly.
How the Game Works
Reviewed by Brian TaylorPublished: July 2026
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The frame is deliberately old fashioned. Five reels, three rows, ten paylines that cannot be switched off, and wins that pay left to right from reel one. Anyone who has played a book slot in the last decade will recognise the shape within a spin or two, and Quickspin has not tried to hide that. The art does the heavy lifting instead: a stone gateway flanked by two armoured dragon heads, lakes of fire behind it, and a soundtrack that leans much harder into metal than the studio’s usual output.
Where the design earns its keep is the strip of ten tiles running along the top of the machine. Those tiles are the paytable in miniature, ordered from the 9 at the left to Anna at the right, and one of them is always lit as the marked symbol. When that marked symbol lands often enough on a spin, three or more for a low symbol and two or more for a premium, every copy stretches to fill its reel and the line wins are counted afterwards. It turns an ordinary two-of-a-kind into something worth watching, and it happens in the base game rather than being locked behind the bonus.
The Book is the piece that ties it together. It acts as a wild, it acts as the scatter, and it also moves the marked symbol one place up that ladder each time it appears. Land two Books on a spin and the mark climbs twice. Land three and you are in the free spins instead, carrying whatever tier the mark had reached at that moment. That single overlap between wild, scatter and upgrade trigger is why the game rewards paying attention to the top of the screen rather than just the reels.
Symbols and Paytable
Six card ranks fill out the bottom of the paytable, 9 through to Ace, paying between 0.50x and 12x stake for a full line. Above them sit four infernal characters: the Commander of Hell and the Lady of Hell, both running 0.50x to 75x, the Lord of Hell at 1x to 160x, and Anna the Demon Huntress at the top of the paying symbols with 1x to 500x. Six card ranks plus four characters is exactly the ten tiles you can count along the top of the machine. The Book matches Anna at 1x to 500x and does double duty as wild and scatter. Those numbers look modest for a game with a 5,846x cap, which tells you plainly where the ceiling actually comes from: a premium marked symbol filling several reels at once during a long free-spin run, not a single lucky line.
Bonus Features Explained
Marked Symbols
Before each base-game spin the machine nominates one symbol type as marked, shown by the lit tile above the reels. The nomination is random and it changes constantly, so most spins mark a card rank. If enough of the marked type lands, the symbols expand vertically to cover their reels, and expanded symbols pay on any line they touch rather than needing to sit in strict sequence. A marked Ace filling three reels is worth a handful of stake. A marked Anna doing the same is the sort of spin that funds the rest of the session.
Book Upgrades
Every Book that lands promotes the marked symbol one rung up the ladder. One Book moves it once, two Books move it twice, and the climb runs strictly in paytable order, so a mark sitting on the King becomes an Ace, then the first of the four infernal characters, and it keeps climbing one tile at a time until it reaches Anna at the top of the ten. It is a small mechanic with an outsized effect on how the game feels, because a Book that fails to trigger anything still leaves you better placed than you were.
The Free Spins Feature
Three, four or five Books trigger the round and pay 2x, 20x or 200x stake respectively as they do. Three Books award ten free spins, four award fifteen and five award twenty-five. One source, SlotCatalog, lists the five-Book award as twenty rather than twenty-five, which is the only real disagreement we found across the databases we checked. The marked symbol carries into the round and keeps expanding under the same rules, further Books add extra spins on top, and each of those Books still pushes the mark higher. A round that starts marking the 10 and finishes marking Anna is where the big numbers come from.
Bonus Buy
Quickspin built in a 125x purchase that drops between three and five Books at random. Great Britain does not permit feature buys, so on a UK licence the button is simply absent and the only route in is the reels. Our advice for anyone playing where it is allowed: 125x is a steep entry against a 5,846x cap, and the buy is not a shortcut to the ceiling.
Pros and Cons
Pros
- The marked symbol works in the base game, which is more than most book slots offer between bonuses.
- The upgrade ladder gives Books value even when they fail to trigger the round.
- Artwork and audio are a genuine step up from the generic Egyptian look the format usually wears.
- 96.15% is a respectable default for a high volatility game with a bonus this concentrated.
- Expanded symbols pay on any line rather than needing a strict left-to-right run.
Cons
- Ten fixed lines on a 5×3 grid means dead spins arrive in clusters, and there is no way to soften that.
- 5,846x is unremarkable in 2026, when plenty of rivals in the same band advertise five figures.
- The 87.16% and 94.19% builds are a real trap if you do not check the help file first.
- Nearly everything of value sits in the free spins, so short sessions can look completely flat.
- The buy is unavailable in Great Britain, which removes the fastest way to see the feature.
Game Screenshot
Demo Play
The play-money build below runs the same rules as the cash version, which makes it the cheapest way to answer the only question that matters here: how long does it take three Books to land on ten lines? Spin it for a few minutes and you will get a much clearer sense of the dry stretches than any RTP figure conveys.
Game Information
Expert Take
Reception in early 2023 was warmer than the raw specification suggests. Slot Gods handed it four out of five, Fruity Slots landed on 7.5 out of ten, and the recurring line across reviews was that the presentation is excellent while the maths is merely fine. Having spent time with it, that reads about right. The upgrade ladder is the genuinely clever part, and it is the reason the game holds attention through a bonus round in a way that plain expanding-symbol titles do not. The complaint that keeps surfacing, fairly, is the ceiling. A studio that later shipped 30,540x on Big Bad Wolf Megaways and 32,760x on Book of Duat was clearly capable of aiming higher, and 5,846x reads conservative next to what the format’s biggest names promise. Whether that bothers you depends on whether you play for the top prize or for the round itself.
Similar Slots to Try
Four picks that overlap with Book Of Inferno on structure, setting or risk profile rather than just artwork.
Thunderkick sets its hellhound on a 5×3 grid at exactly the same 96.15% headline RTP, and the 6,666x cap sits within touching distance of the Quickspin figure.
Yggdrasil takes the same underworld setting to a 5×4 frame with 25 lines and a 96.40% RTP, though its 3,968x ceiling is the more modest of the two.
The structural twin: 5×3, ten lines and a chosen symbol that fills its reel in free spins. Very high volatility and a 5,000x cap make the risk profile familiar.
For anyone who wants the demons without the ten-line frame, Big Time Gaming spreads 4,096 ways across a 6×4 board at 96.43% and a far higher 50,000x limit.
About the Developer
Quickspin has been operating out of Stockholm since 2011 and has sat inside the Playtech group since 2016, which is what puts its games in front of British players at the scale they reach. The studio’s identity has always been visual polish over volume, and Book Of Inferno is an unusually aggressive entry by that standard: heavy metal audio, gore-adjacent artwork and a five-out-of-five volatility rating are not what the Sakura Fortune and Big Bad Wolf catalogue trained anyone to expect. It is also the studio’s only proper horror release, which makes it something of an outlier rather than a template. Our Quickspin studio profile sets out the full local record and the licensing position.
Read alongside the rest of the catalogue, this one marks the point where Quickspin started testing how far it could push a single mechanic instead of layering several. The four titles below show the range on either side of it.
The studio at its most generous on ceilings, trading fixed lines for up to 117,649 ways and a 30,540x maximum at 96.05%.
A 1,024-ways duel between hunter and gorgon, rated very high volatility on our table and running at 96.17%.
Quickspin working in clusters rather than lines, on a 5×5 Roman grid at 96.24% with an 8,168x limit.
Proof the studio can go small: a 3×3 board with five lines, 96.23% RTP and an 8,000x top prize.
Book Of Inferno Key Stats
Book Of Inferno slot information last reviewed: July 2026
| Book Of Inferno Slot Info | |
|---|---|
| Name: | Book Of Inferno |
| Provider: | Quickspin |
| Developer Rank: | 19 out of 130+ Quickspin games by British player interest |
| RTP: | 96.15% default (reduced 94.19% and 87.16% builds exist, so check the help file before playing) |
| RTP Category: | Medium-High (our band runs 96.00% to 96.49%, and 96.15% sits in its lower third) |
| RTP Rank: | Approximately 1,340 out of 4,300+ recorded games |
| Feature Description: | A Book that is wild and scatter at once, plus a marked paying symbol that expands to fill its reel and climbs a ten-tile ladder every time another Book lands |
| Feature Categories: | Free Spins, Expanding Symbols, Scatter Symbols, Bonus Buy (not available in Great Britain) |
| Reels: | 5 |
| Rows: | 3 |
| Paylines: | 10 fixed |
| Volatility: | High |
| Volatility Rank: | Around 210 out of 4,300+ games, and 5 out of 5 on Quickspin’s own scale |
| Min Bet: | £0.10 |
| Max Bet: | £100 |
| Max Win: | 5,846x stake |
| Release Date: | 7 February 2023 (SlotCatalog records an operator-exclusive launch on 25 January 2023) |
| Slotslike Rank: | Unranked for now, since the page has only just joined our 4,300+ game index (View Top 100) |
Slots with the Same Features
Free Spins
The whole game bends towards its bonus, so these two make useful comparisons for how differently a free-spin round can be built.
Another ten-line book title, this time from WMS at 95.25% and rated low volatility, so the swings are nothing like as sharp.
Free spins built on clusters instead of lines, and a useful contrast if you want the studio without fixed paylines.
Expanding Symbols
Expansion is the mechanic Book Of Inferno modifies rather than invents, and these show the more conventional treatment.
The expansion happens only in free spins here, which makes the base game quieter than Quickspin allows.
Expansion arrives through wilds rather than a nominated paying symbol, on a taller 5×4 board.
High Volatility
If the five-out-of-five rating is the appeal rather than the drawback, both of these belong on the same shortlist.
Nine lines that stretch to 243 ways when the hellhound wilds land, at the same RTP figure and a similar appetite for dry spells.
Our table rates this very high volatility, a step beyond Book Of Inferno, with a 50,000x ceiling to match.
Frequently Asked Questions
How does the Book Of Inferno bonus work?
Three, four or five Books anywhere on the reels start the free spins and pay 2x, 20x or 200x the stake as a scatter award on the way in. The trigger buys you ten, fifteen or twenty-five spins depending on how many Books landed, and one symbol is nominated as the marked symbol before the round begins. Any further Books during the round add extra spins and push the marked symbol one rung up the ladder, so a late Book can turn a run of ten-value expansions into Anna paying up to 500x a line.
What is the RTP of Book Of Inferno?
The headline figure is 96.15%, which sits in the lower third of the Medium-High band we use on this site, since that band runs from 96.00% to 96.49%. Quickspin also supplies reduced builds at 94.19% and 87.16%, and operators choose which one to run, so the number in the help file is the only one that matters for your session. Sources also disagree about the buy: Fruity Slots records the purchased round at 96.65% while Hideous Slots lists it at the standard 96.15%.
What is the maximum win on Book Of Inferno?
5,846 times your total stake, so a £1 spin caps at £5,846 and the £100 maximum bet caps at £584,600. SlotCatalog puts the odds of actually reaching that number at roughly one in a hundred million spins, which is worth reading before anyone chases it.
Is Book Of Inferno high volatility?
Yes. Quickspin scores it five out of five on its own volatility scale, the top rung the studio uses, although Fruity Slots rates it four out of five. Either way you should expect long stretches of small line wins on ten paylines, with the meaningful money arriving in the free spins.
What are the best slots like Book Of Inferno?
Beat The Beast Cerberus Inferno is the closest match on both theme and RTP, Book of Oz mirrors the ten-line structure and the chosen expanding symbol, and Liliths Inferno keeps the underworld setting on a wider 5×4 board. Lil Devil is the one to pick if you want the demons but prefer ways-to-win maths over fixed lines.
Can I play Book Of Inferno free, and is there a demo?
Yes, a play-money version runs on this page, and most licensed British casinos also show a demo once you have registered. Rules for the demo build and the real-money build are identical apart from the balance, which means a play-money session will show you exactly how patient this ten-line frame expects you to be long before your own money is involved.
Who makes Book Of Inferno?
Quickspin, the Stockholm studio founded in 2011 and part of the Playtech group since 2016. Our Quickspin studio profile covers the wider catalogue and the supplier licensing position in Great Britain.
Can I buy the bonus on Book Of Inferno?
The game ships with a 125x buy that guarantees at least three Books, and the in-game button is visible in the screenshots further up this page. British operators cannot offer it, so if you are playing on a UK licence you will only ever reach the round by landing the Books yourself.
Our Verdict on Book Of Inferno
Book Of Inferno is a better game than its numbers imply. The ladder above the reels changes what you watch during a spin, the base-game expansion stops the ten-line frame feeling as dated as it looks, and the artwork is among the strongest Quickspin has produced. Against that, the 5,846x cap is modest for something this volatile, the reduced RTP builds are a genuine hazard, and British players lose the buy that makes the round accessible elsewhere. It suits players who enjoy a slow burn towards a well-designed bonus and can sit through the quiet spells. Anyone chasing headline multipliers will find more elsewhere in the same band.
SlotsLike rating: 7.5/10
Sources & Verification
Specifications were cross-checked across four independent slot databases in July 2026, with the studio’s own catalogue used to confirm the provider and title.
RTP is a long-run theoretical figure and cannot predict any individual session. See our responsible gambling guide and our review methodology.