Book of Santa vs Book of Dead, Book of Ra, Starburst and Gonzo's Quest.
Five video slots, one comparison. We put Book of Santa by Endorphina next to Book of Dead (Play'n GO), Book of Ra Deluxe (Novomatic), Starburst (NetEnt) and Gonzo's Quest (NetEnt). RTP, maximum wins, bonus mechanics, volatility and the best UKGC casinos for UK players in one table, five profiles and an honest verdict.
What Are Book Slots? A Quick Primer
A short chapter for anyone discovering the genre for the first time. Five titles, one core mechanic.
Book slots follow a simple formula: a special book symbol acts as both wild and scatter. Land three or more books on a single spin and you trigger free spins. Before those free spins begin, one symbol is randomly selected to expand across entire reels whenever it appears. That expanding symbol is the engine behind every big win in the genre.
Novomatic invented the template with Book of Ra in 2005. Play'n GO refined it with Book of Dead in 2016. Endorphina added a Christmas twist with Book of Santa. Today, dozens of book-themed slots exist across every major provider. RTP ranges from 95% to 96.5%, volatility runs medium to high, and free spins can retrigger within the bonus round.
The appeal is variance. One dead spin sequence can turn into a full-screen payout during free spins. That tension between drought and explosion keeps the format popular nearly twenty years after launch.
What all book slots share
- Book symbol: Acts as both wild and scatter
- Free spins: 10 spins with one expanding symbol
- Layout: 5x3 reels, 10 paylines
- Gamble: Risk/double feature after any win
- Mobile: Browser-based, no download required
Top Video Slots of 2026 at a Glance
Eight parameters, five titles. This table gives you the essential orientation before your first deposit.
| Slot | Developer | RTP | Max Win | Bonus Feature | Volatility | Layout | Mobile | Demo |
|---|---|---|---|---|---|---|---|---|
| Book of Santa | Endorphina | 96.00 % | x5,000 | Free Spins + Expanding + Gamble + Buy Bonus | Medium-High | 5x3, 10 lines | Yes | Yes |
| Book of Dead | Play'n GO | 96.21 % | x5,000 | Free Spins + Expanding + Gamble | High | 5x3, 10 lines | Yes | Yes |
| Book of Ra Deluxe | Novomatic | 95.10 % | x5,000 | Free Spins + Expanding | High | 5x3, 10 lines | Yes | Yes |
| Starburst | NetEnt | 96.09 % | x500 | Expanding Wilds + Re-spins | Low | 5x3, 10 lines | Yes | Yes |
| Gonzo's Quest | NetEnt | 95.97 % | x2,500 | Avalanche + Free Falls + Multipliers | Medium | 5x3, 20 lines | Yes | Yes |
| Book of Santa (Bonus Pop) | Endorphina | 96.00 % | x5,000 | Buy Bonus into Free Spins | Medium-High | 5x3, 10 lines | Yes | Yes |
* Max win figures represent the theoretical maximum multiplier on a single spin at minimum bet. Actual payouts depend on stake size and casino-specific win caps. Book of Santa's x5,000 max win applies to both the base game and free spins feature.
Important note: Book of Santa by Endorphina is a distinct title from other "Book of" slots. Some affiliate sites confuse it with Book of Christmas or other seasonal reskins. Book of Santa is a standalone Endorphina product with its own math model, paytable and RTP certification.
Book of Santa by Endorphina: 96% RTP with Expanding Symbols
Book of Santa by Endorphina puts Santa Claus into the classic book slot formula. 96% RTP, 5x3 reels, 10 paylines and a free spins round built on expanding symbols. Land three or more Santa's Book scatters on any spin and you receive 10 free spins. Before those spins begin, one symbol is randomly chosen to expand across all three rows when it lands.
Two features set it apart from other book slots. The Bonus Pop (buy bonus) option lets you skip the base game entirely and purchase direct entry into free spins. The Risk/Gamble feature after any win lets you double your payout on a card guess. Both add tactical layers that Book of Ra Deluxe does not offer.
Minimum bet is £0.10, maximum £100. The x5,000 max win means a £100 spin could theoretically return £500,000. Endorphina holds licences certified by BMM Testlabs and iTech Labs. The slot is available at LeoVegas, Casumo, Mr Green, Betway and Sky Vegas, all holding active UKGC licences.
Best for: Players who enjoy the book slot format and want a seasonal twist with buy bonus access. The gamble feature adds risk control that most competitors lack.
Book of Santa Specifications
Key mechanics: 3+ scatters trigger 10 free spins with one expanding symbol. Risk/Gamble double feature. Bonus Pop buy bonus option.
Book of Dead by Play'n GO: The Market Leader
Book of Dead is the most played book slot in the UK. Play'n GO released it in 2016, and it has held the top spot ever since. Rich Wilde explores an Egyptian tomb, three book scatters trigger 10 free spins, and one expanding symbol is chosen at random. The formula mirrors Book of Ra but with sharper graphics and higher RTP.
RTP sits at 96.21%, the highest in this comparison among book slots. Max win is x5,000 on a single spin. The gamble feature lets you risk any win on a 50/50 card colour guess, doubling up to five times consecutively. High volatility means long dry spells punctuated by explosive free spin rounds.
Play'n GO holds UKGC, MGA and Swedish licences. Book of Dead is available at virtually every UK casino. LeoVegas, Casumo, Mr Green, Betway and Sky Vegas all carry it in their slot lobbies. Free play demo mode is available without registration at most operators.
Best for: Players who want the most established book slot with the highest RTP. The gamble feature adds post-win excitement that few competitors match.
Book of Dead Specifications
Feature: gamble up to 5 times after any win. Free spins can retrigger within the bonus round for extended sessions.
Book of Ra Deluxe by Novomatic: The Original
Book of Ra invented the book slot genre. Novomatic launched the original in 2005 and released the Deluxe version shortly after. An explorer hunts for the Book of Ra in an Egyptian pyramid. Three books trigger 10 free spins with one expanding symbol. The mechanic that every book slot copies started here.
RTP is 95.10%, the lowest in this comparison. Max win reaches x5,000. Volatility is high, with long base game droughts and concentrated payouts during free spins. The Deluxe version improved the graphics and adjusted the paytable but kept the core math model intact.
Novomatic is an Austrian company with a strong land-based presence. The online version is distributed through Greentube, their digital arm. Availability at UK casinos is more limited than Book of Dead. LeoVegas and Sky Vegas carry it. Betway and Mr Green stock selected Novomatic titles.
Best for: Purists who want the original book slot experience. Lower RTP makes it less favourable for long sessions, but the nostalgia factor and proven volatility profile attract dedicated fans.
Book of Ra Deluxe Specifications
The original that started the entire book slot genre. Novomatic also offers Book of Ra 6, Book of Ra Magic, and Book of Ra Mystic Fortunes.
Starburst by NetEnt: Low Volatility, High Frequency
Starburst from NetEnt is the most played online slot in history. Released in 2012, it remains the default bonus slot at hundreds of UK casinos. Five reels, three rows, 10 paylines paying both ways. No free spins round. The entire bonus mechanic revolves around the expanding Starburst Wild on reels 2, 3 and 4, which triggers up to three re-spins.
RTP is 96.09%. Max win is capped at x500, the lowest in this comparison by a wide margin. Volatility is low, producing frequent small wins with rare large payouts. That makes Starburst the safest slot here for bankroll preservation but the weakest for chasing big multipliers.
NetEnt (now part of Evolution) holds every major licence including UKGC, MGA and the Swedish Gambling Authority. Starburst is available at every casino in this comparison: LeoVegas, Casumo, Mr Green, Betway and Sky Vegas. Demo mode runs without registration everywhere.
Best for: Beginners and low-risk players. Frequent wins, simple mechanics, no complex bonus rounds. The safest entry point in this comparison.
Starburst Specifications
Pays both left-to-right and right-to-left. Expanding wilds on reels 2, 3 and 4 trigger automatic re-spins (up to 3).
Gonzo's Quest by NetEnt: Avalanche Mechanics
Gonzo's Quest is not a book slot. It is included in this comparison because it targets the same audience: players who want medium-high volatility with strong bonus potential. NetEnt released it in 2011 with the Avalanche mechanic, where winning symbols explode and new ones fall from above. Consecutive avalanches increase a multiplier from x1 to x2 to x3 to x5.
RTP is 95.97%. Max win sits at x2,500. The Free Fall bonus (triggered by three golden scatter symbols) increases the avalanche multipliers to x3, x6, x9 and x15. A single free fall round with consecutive wins can produce payouts far exceeding the base game potential.
NetEnt's Avalanche mechanic inspired dozens of imitators, but Gonzo's Quest remains the most recognised. The slot is available at LeoVegas, Casumo, Mr Green, Betway and Sky Vegas. A Megaways version (Gonzo's Quest Megaways by Red Tiger) offers a modern variant with up to 117,649 ways to win.
Best for: Players who want cascading wins with escalating multipliers. Different from book slots but delivers comparable volatility with a unique visual presentation.
Gonzo's Quest Specifications
Avalanche mechanic: winning symbols disappear, new ones fall in. Consecutive wins multiply payouts up to x15 during Free Falls.
Book of Santa Bonus Pop: Buy Your Way Into Free Spins
The Bonus Pop feature in Book of Santa lets you purchase direct entry into the free spins round. Instead of waiting for three scatter symbols to land naturally, you pay a fixed multiple of your bet and jump straight into 10 free spins with an expanding symbol. The cost varies by operator but typically sits at 80x to 100x your stake.
This feature changes the session dynamic completely. Base game grinding becomes optional. Players who want concentrated action can buy round after round of free spins. The math model maintains the same 96% RTP whether you trigger free spins organically or purchase them.
Buy bonus is not available at all UK casinos. UKGC regulations allow it, but some operators disable it as a responsible gambling measure. LeoVegas and Casumo offer Bonus Pop. Mr Green and Betway may restrict it depending on your account settings and deposit history.
Best for: Experienced players who want to skip the base game and go directly to the high-variance free spins round. Not recommended for beginners or players on tight bankrolls.
Bonus Pop Specifications
Bonus Pop purchases free spins directly. Same RTP as organic triggers. Availability depends on casino and UKGC compliance settings.
Book of Santa vs Book of Dead: The Key Matchup
Two book slots with identical mechanics but different studios, themes and feature sets. Here is how they compare side by side.
Book of Santa
- RTP: 96.00 %
- Max Win: x5,000
- Mechanic: Book slot with expanding symbols
- Theme: Christmas / Santa Claus
- Buy Bonus: Yes (Bonus Pop)
- Gamble: Risk/Double feature
- Release: 2019
- Studio: Endorphina (Czech Republic)
- Strength: Buy bonus access, seasonal theme
- Weakness: Lower brand recognition than Book of Dead
Book of Dead
- RTP: 96.21 %
- Max Win: x5,000
- Mechanic: Book slot with expanding symbols
- Theme: Egyptian / Rich Wilde
- Buy Bonus: No
- Gamble: Card colour/suit guess
- Release: 2016
- Studio: Play'n GO (Sweden)
- Strength: Market leader, highest RTP, widest availability
- Weakness: No buy bonus option
Our verdict: Book of Dead wins on RTP (96.21% vs 96.00%) and brand recognition. Book of Santa wins on features with its Bonus Pop buy bonus option. For players who want to skip the base game grind, Book of Santa is the stronger choice. For pure RTP optimisation and the widest casino availability, Book of Dead remains the standard.
Which Slot Has the Best RTP? A Ranked Breakdown
RTP (Return to Player) is the single most important long-term metric. Over 10,000 spins, even a 0.5% difference shifts your balance noticeably.
| Rank | Slot | RTP | Difference vs Book of Santa | Expected Loss per £1,000 |
|---|---|---|---|---|
| 1 | Book of Dead (Play'n GO) | 96.21 % | +0.21 % | £37.90 |
| 2 | Starburst (NetEnt) | 96.09 % | +0.09 % | £39.10 |
| 3 | Book of Santa (Endorphina) | 96.00 % | - | £40.00 |
| 4 | Gonzo's Quest (NetEnt) | 95.97 % | -0.03 % | £40.30 |
| 5 | Book of Ra Deluxe (Novomatic) | 95.10 % | -0.90 % | £49.00 |
| - | Range across all five | 95.10 - 96.21 % | 1.11 % spread | £37.90 - £49.00 |
What this means: A player wagering £1,000 loses £40 statistically on Book of Santa versus £49 on Book of Ra Deluxe. That £9 gap per £1,000 wagered compounds over months. An active player turning over £500 to £1,500 per session sees the difference add up to £4.50 to £13.50 per sitting.
Caveat: RTP is a long-term average. In any single session, variance dominates. A 100-spin run can produce results wildly above or below the stated RTP. The numbers above become reliable only across thousands of spins.
UKGC Casinos with Book of Santa: LeoVegas, Casumo, Mr Green, Betway, Sky Vegas
Five UKGC-licensed operators carry Book of Santa alongside the other slots in this comparison. All hold active UK Gambling Commission licences.
| Casino | Licence | Book of Santa | Book of Dead | Book of Ra | Starburst | Gonzo's Quest | GQ Megaways | Welcome Offer |
|---|---|---|---|---|---|---|---|---|
| LeoVegas | UKGC | Yes | Yes | Yes | Yes | Yes | Yes | Up to £100 + 50 FS |
| Casumo | UKGC | Yes | Yes | Yes | Yes | Yes | Yes | 20 FS no deposit |
| Mr Green | UKGC | Yes | Yes | Yes | Yes | Yes | Yes | 100% up to £100 + 200 FS |
| Betway | UKGC | Yes | Yes | No | Yes | Yes | No | Bet £10 get £30 FS |
| Sky Vegas | UKGC | Yes | Yes | Yes | Yes | Yes | No | 50 FS no wagering |
LeoVegas carries all five slots plus Gonzo's Quest Megaways. Fast withdrawals via PayPal (under 24 hours), Apple Pay and Visa Debit supported. The app is rated 4.5 stars on the App Store. LeoVegas won EGR Operator of the Year four times.
Casumo offers 20 free spins with no deposit required for new UK players. Withdrawal processing averages 6 hours for e-wallets. The interface groups slots by provider, making it easy to find Endorphina titles. All five comparison slots are available.
Mr Green is our pick for the best welcome package. 100% match up to £100 plus 200 free spins across selected slots. Mr Green's Green Gaming tool tracks your play patterns and flags risky behaviour. UKGC licence number 000-039264-R-319367-009.
Betway excels at sports and casino crossover. Bet £10 on any slot and receive £30 in free spins. Book of Ra is not available at Betway, but the other four slots are stocked. Withdrawal via Visa Debit takes 1 to 3 business days.
Sky Vegas offers 50 free spins with no wagering requirements, the cleanest bonus in this comparison. Backed by Sky Betting & Gaming (Flutter Entertainment). Novomatic and NetEnt are well represented. Endorphina titles including Book of Santa are available in the main lobby.
UKGC Licensing: Are These Slots Legal in the UK?
The short answer: yes. All five slots in this comparison are available at UKGC-licensed casinos and fully legal for UK players aged 18 and over.
The UK Gambling Commission (UKGC) regulates all online gambling in Great Britain under the Gambling Act 2005. Every casino listed in this comparison holds an active UKGC licence. Endorphina, Play'n GO, Novomatic (Greentube) and NetEnt (Evolution) all supply games to UKGC-regulated operators.
UKGC requirements include mandatory deposit limits, self-exclusion via GAMSTOP, reality checks during play, age verification before the first deposit, and source-of-funds checks for high-value players. These protections apply to every slot in this comparison equally.
The Gambling Act 2005 review (published 2023) introduced additional measures. Maximum online slot stakes may be capped at £2 to £5 per spin following ongoing consultations. If implemented, this would affect all five slots. Book of Santa's current £100 maximum bet would be reduced significantly. The timeline remains uncertain, but UK players should expect stricter limits in late 2026 or 2027.
All five slots use certified Random Number Generators (RNGs) tested by independent labs. Book of Santa is certified by BMM Testlabs and iTech Labs. Book of Dead carries eCOGRA certification. Starburst and Gonzo's Quest are also eCOGRA-certified. Book of Ra Deluxe is GLI-certified through Greentube.
Players in Great Britain have full legal protection when using UKGC-licensed casinos. Disputes can be escalated to the casino's ADR (Alternative Dispute Resolution) provider. The UKGC maintains a public register of all licensed operators at gamblingcommission.gov.uk.
UKGC Status of All Five Slots
- Book of Santa: Available at UKGC casinos
- Book of Dead: Available at UKGC casinos
- Book of Ra Deluxe: Available at UKGC casinos
- Starburst: Available at UKGC casinos
- Gonzo's Quest: Available at UKGC casinos
- Status: April 2026
Source: UK Gambling Commission public register, gamblingcommission.gov.uk. This is not legal advice. Consult a solicitor if in doubt.
Responsible Gambling Support
- BeGambleAware, free advice and support
- GamCare, counselling and treatment
- GAMSTOP, self-exclusion from all UK sites
- National Gambling Helpline: 0808 8020 133
- GAMSTOP self-exclusion is free and covers all UKGC operators
Practical Guidelines
- Set daily, weekly and monthly deposit limits in your casino account.
- Never gamble with money earmarked for rent, bills or essentials.
- Use reality check reminders to track time spent playing.
- Review your net balance at the end of each month.
- If gambling stops being fun, call 0808 8020 133. 18+ only.
Frequently Asked Questions
Which slot has the best RTP in this comparison?
What makes Book of Santa different from Book of Dead?
Is Book of Santa better than Book of Ra?
Which slot has the highest maximum win?
Are these slots licensed by the UKGC?
Which casino has all five slots?
Which slot is best for beginners?
What is the difference between book slots and standard video slots?
Final Verdict: Which Slot Suits Which Player?
From five slots, Book of Santa by Endorphina earns our top recommendation for players who want the complete book slot experience with modern extras. 96% RTP matches the genre standard, expanding symbol free spins deliver the classic mechanic, and the Bonus Pop buy bonus adds a layer of control that Book of Dead and Book of Ra lack. Book of Dead remains the market leader with the highest RTP at 96.21% and the widest casino availability. Book of Ra Deluxe is the nostalgic choice for purists. Starburst is the safest pick for beginners who prioritise frequent wins over big multipliers. Gonzo's Quest offers a completely different experience with avalanche cascades and escalating multipliers.
All five slots are fully legal at UKGC-licensed casinos. LeoVegas, Casumo, Mr Green, Betway and Sky Vegas carry these titles under active UK Gambling Commission licences. Start in demo mode, set deposit limits before your first real-money spin, and use GAMSTOP if you need to take a break. 18+ only. If gambling stops being fun, call the National Gambling Helpline at 0808 8020 133.