Home›Bonanza slots›Book of Bonanza
🕒 Last updated: 27 July 2026
Book of Bonanza by Hölle Games is a sweets-skinned take on the classic book format, released on 1 July 2024 with 10 fixed paylines on a 5×3 grid, a top RTP of 95.18% and a 10,000x ceiling.
Check the studio before you spin. A second, entirely different slot with the same title was released by SmartSoft Gaming on 15 October 2024. Everything on this page describes the Hölle Games version. There is no Amatic Industries slot called Book of Bonanza.
| Provider | Hölle Games |
| Release date | 2024-07-01 |
| RTP | 95.18%Operator-selectable tiers: 95.18% / 92.19% / 88.68% / 84.11% |
| Volatility | High |
| Maximum win | 10,000x your stake |
| Layout | 5×3 |
| Paylines / ways | 10 |
| Bet range | 0.10 EUR – 20.00 EUR |
| Hit frequency | 25% |
| Bonus buy | Yes — 60x stake (not available in UK) |
Where to play Book of Bonanza online
Where to play Book of Bonanza — casinos we work with
How Book of Bonanza works
The board is a standard 5×3 with 10 fixed paylines, all of them always active. Wins pay left to right from the first reel, and stakes run from 0.10 to 20.00 EUR — a narrow band, and low enough at the top end to rule the game out for high-stakes play. The stated hit frequency is 25%, or one paying spin in four.
The book is both scatter and special symbol, which is the defining trait of the format. It triggers the bonus by count rather than by position, then returns inside the round as the symbol that decides the payout structure. In the base game, wilds carry multipliers of x2 to x5, so a line win landing with one attached is worth between double and five times its paytable value.
Working out which Book of Bonanza you have opened is worth thirty seconds. The Hölle Games build is the 5×3, 10-line game described here. SmartSoft Gaming’s game, released three and a half months later, runs 6 reels and 40 paylines at a 97.6% RTP with bets from 0.4 to 62.5. Different studio, different grid, different maths, same name in the lobby.
Book of Bonanza bonus features
Book scatters trigger the free spins round. Neither the number of scatters required nor the number of spins awarded appears in the sources gathered, so both need confirming from the paytable — a real gap for a game whose value is concentrated in this round.
What is documented is the expanding symbol. One symbol is chosen at random for the round, and whenever it lands it expands across the reels and pays in any position, ignoring the usual left-to-right adjacency rule. Draw a low-value symbol and the round is flat; draw a high-value one and the 10,000x ceiling becomes reachable at all. That single random selection carries most of the variance in the game, which is why book slots reward patience with the bonus rather than skill inside it.
Two smaller features round it out. A gamble feature is available for pressing a completed win, and a bonus buy is listed at 60x the stake for players outside the UK. That buy is genuinely unresolved: SlotCatalog documents it at 60x while SlotsMate lists the game as having no buy option at all. One record is out of date, or availability differs by operator build — either way, do not count on the button being there.
Book of Bonanza RTP, volatility and max win
Book of Bonanza ships with four operator-selectable RTP settings: 95.18%, 92.19%, 88.68% and 84.11%. That is a spread of more than 11 percentage points between the best and worst versions, far wider than the one-to-two point ladders typical of larger studios, and wide enough that the bottom tier is effectively a different product from the top one.
The sources also disagree about which setting is normal. SlotCatalog names 92.19% as the default while listing 95.18% as the maximum; SlotsMate and LiveBet both headline 95.18%. Read that as evidence the middle tiers are in real circulation rather than sitting unused in a certification file. Open the game’s information panel and find the RTP line before staking — with this spread it is the most consequential number attached to the game. Note too that SlotsMate quotes an absolute cap of 200,000 and 250x per line rather than SlotCatalog’s 10,000x; those are different metrics, not a contradiction.
Book of Bonanza pros and cons
What we like
- Multiplier wilds worth x2 to x5 apply in the base game, not just in free spins
- Stated hit frequency of 25%, around one paying spin in four
- Documented 10,000x ceiling on a simple 10-payline 5×3 board
- Low 0.10 EUR minimum stake and an optional gamble feature
- All four RTP tiers are published, so you can see what a casino has to choose from
What to watch out for
- The lowest tier is 84.11%, more than 11 points below the top setting
- Even the top tier of 95.18% sits below most of the Bonanza field
- Bonus buy availability is unresolved: SlotCatalog lists 60x, SlotsMate lists none
- A second, unrelated Book of Bonanza from SmartSoft Gaming makes lobby identification harder
Book of Bonanza compared with other Bonanza slots
If the 5×3 payline format is the draw but the tier ladder puts you off, the neighbours run higher. Big Bass Bonanza 1000 uses the same 10 fixed paylines on 5×3 at 96.51% with a 20,000x cap. NetGame’s Big Catch Bonanza sits at 96.05% across 12 paylines for 12,000x. Brick House Bonanza swaps lines for 243 ways at 96.50%, matching this game’s 10,000x ceiling with a 1 in 3.58 hit rate. Big Bass Bonanza 3 Reeler shrinks to 3×3 and five paylines for 5,000x.
Verdict
The Hölle Games Book of Bonanza is a competent, unfussy book slot with one genuinely useful twist: multiplier wilds worth x2 to x5 land in the base game, not only in free spins. What should decide it for you is the configuration. At 95.18% it is a reasonable member of the format; at 84.11% it is not, and the casino makes that choice rather than you. Confirm the tier and the bonus buy in the client, and confirm you have the Hölle game rather than SmartSoft’s.
Book of Bonanza FAQ
Who makes Book of Bonanza?
The game described here is by Hölle Games, released 1 July 2024. No Amatic Industries slot of this name exists. A separate, unrelated Book of Bonanza was released by SmartSoft Gaming on 15 October 2024.
Are there two slots called Book of Bonanza?
Yes. The Hölle Games version runs 10 paylines on a 5×3 grid with a top RTP of 95.18% and a 10,000x cap. The SmartSoft Gaming version runs 6 reels and 40 paylines at 97.6% RTP, with bets from 0.4 to 62.5. Check the provider name on the game’s info screen.
What is the RTP of Book of Bonanza?
The Hölle Games game has four operator-configurable settings: 95.18%, 92.19%, 88.68% and 84.11%. SlotCatalog names 92.19% as the default while SlotsMate and LiveBet headline 95.18%, so the tier you get depends entirely on the casino.
What is the max win in Book of Bonanza?
SlotCatalog gives 10,000x the stake. SlotsMate instead quotes an absolute cap of 200,000 alongside 250x per line, which measures something different rather than contradicting the 10,000x figure.
Does Book of Bonanza have a bonus buy?
This is unresolved. SlotCatalog lists a buy at 60x the stake, unavailable in the UK, while SlotsMate records no buy feature for the game. Check the game menu at your casino rather than assuming either way.
