Game Information
Book of Oz Slot Review
Everyone has a book in them! And every slot studio has a game that features a secret book, or a magic book, or an ancient book… or in this case, a steampunk style book!
You can try the free play demo for Book of Oz on this page before exploring more online slots or comparing UK casinos.
That’s the theming from this Book of Oz slot game, which is a co-release with Microgaming from Triple Edge Studios, a studio so edgy that they have three edges! In fact, the company is pretty cutting edges, having only been launched in 2018, and is already making a stir.
Book of Oz shows nicely why they are.
The Book of Oz slot game is really beautiful looking and does more than just paste some theming on top of a game engine. This is a really well-themed game, and it will attract plenty of players on visual terms alone.
They’ll want some meat though, and the game delivers with great bonus features in the base game the likes of which you’ve never seen before, and which we’ll cover later.
But there are a thousand-and-one books on the slot market, should you open this one?
Let’s have a look!
Bets Triple Edged Studios Casinos to Play Book of Oz Slot
Top 19 UK online casinos
Open the full review for context, or hover/tap terms for the offer fine print.
Get 200 free spins when you stake £10
TermsNew customers only. Opt In required. £/€10 min stake on Casino slots within 30 days of registration. Max bonus 200 Free Spins on selected games credited within 48 hours. Free Spins expire after 7 days. iOS app restrictions may apply. Email/SMS validation may apply. Not available in NI. Full T&Cs apply.- UK licence checked
- Fast withdrawals
- Withdrawal-friendly cashier
100% up to £25 + 50 Free Spins
TermsAutomatically credited upon 1st Deposit (min £10). Max Bonus £25. Game: Big Bass Bonanza, Spin Value: £0.1. WR 10x Bonus (only Slots count) in 30 days. WR 10x free spin winnings (only Slots count) in 30 days. Max bet is 10% (min £0.10) of the free spin winnings and bonus or £5 (lowest applies). Bonus Policy applies.- UK licence checked
- Trusted payments
- Free spins included
Deposit and wager £10 for 50 cash spins (at 20p)
TermsNew players only | Deposit & wager at least £10 to get free spins | Free Spins winnings are cash | No max cash out | Eligibility is restricted for suspected abuse | Skrill deposits excluded | Free Spins value £0.20 per spin | Free Spins expire in 48 hours |- UK licence checked
- Apple Pay ready
- Free spins included
50 Wager free Spins when you stake £50
Terms18+. New players only. Opt-in required. Min deposit £20. Offer is 50 wager free spins on Big Bass Splash when wagering min. £50 on slots by 23:59 GMT on the same day as your first deposit. The wager-free spins must be used within 72hrs. Winnings from free spins credited as cash funds and capped at £50. Cash funds are immediately withdrawable. Affordability checks apply.. Terms Apply. BeGambleAware.org- UK licence checked
- Cash funds
- Withdrawal-friendly cashier
Deposit and wager £10 for 100 cash spins (at 10p)
TermsNew players only | Deposit & wager at least £10 to get free spins | Free Spins winnings are cash | No max cash out | Eligibility is restricted for suspected abuse | Skrill deposits excluded | Free Spins value £0.10 per spin | Free Spins expire in 48 hours |- UK licence checked
- Cash spins
- Free spins included
100% Bonus of up to 100 Bonus Spins on Big Bass Bonanza
Terms18+. New players only. Opt-in required. Min deposit £20. Welcome offer is 1 Yoo Spin for every £1 deposited up to 100 spins. To claim the offer, you need to wager min £20 on slots from your 1st deposit by 23:59 GMT. Spins are credited in proportion to your deposit amount and are valid on Big Bass Bonanza. Winnings from bonus spins are credited as bonus funds and are capped at an equal number of spins credited. These bonus funds can be used on slots only. Bonus funds are separate to cash funds and subject to 10x wagering on the bonus amount. Only bonus funds count towards wagering contribution. £5 max bonus bet. Bonus funds and spins must be used within 72 hours. Affordability checks apply. Full Terms apply. BeGambleAware.org.- UK licence checked
- 10x wagering
- Free spins included
100 Free Spins on Book of Dead + £1000 welcome package
TermsNew Players Only. Min Deposit £10 required. Wager from real balance first. 10x wager the bonus money within 30 days and 10x wager any winnings from the free spins within 7 days. Contribution varies per game. Available on selected games only. Wager calculated on bonus bets only. Bonus offer and any winnings from the offer are valid for 30 days / Free spins and any winnings from the free spins are valid for 7 days from receipt. Max conversion: £50 the bonus amount or from free spins: £20. Limited to 5 brands within the network. Withdrawal requests void all active/pending bonuses. Excluded Skrill and Neteller deposits. Full Terms apply- UK licence checked
- Large package
- Withdrawal-friendly cashier
100% up to £25 + 500 Zee Points
TermsNew players only. Min Deposit £20 Max Bonus Bet £5 Winnings from spins capped at £50 100 Zee Spins valid on Starburst (first 10 credited immediately upon first deposit; rest credited at 07:00 GMT at 10/day). Spins must be used by 23:59 GMT of the day on which they are credited to player account, any unused shall be removed. Bonus funds must be used within 30 days. Bonus funds are separate to Cash funds, and subject to 10x wagering (bonus + cash). BeGambleAware.org , 18+ T&C's Apply- UK licence checked
- 10x wagering
- Free spins included
100% match bonus up to £50
TermsFirst deposit only. 100% Bonus Match up to £50. Min deposit £10. Credited within 7 days. 10x wagering, £50 max conversion. Max one claim per player. 18+. Full T&Cs apply.- UK licence checked
- 10x wagering
- Clear wagering terms
Play £10 get 100 spins on Big Bass Splash
TermsNew players only. 18+. UK only. Min deposit £10 and £10 stake on slot games required. 100 Free Spins on Big Bass Splash credited automatically. Free Spins value: £0.10 each. Free Spins expire 48 hours after crediting. No wagering on Free Spins; winnings paid as cash. Eligibility restrictions apply. Full Terms of Welcome Offer, General Bonus Terms, and General Terms and Conditions.- UK licence checked
- Cash winnings
- Free spins included
100% match bonus up to £50
TermsFirst deposit only. 100% Bonus Match up to £50. Min deposit £10. Credited within 7 days. 10x wagering, £50 max conversion. Max one claim per player. 18+. Full T&Cs apply.- UK licence checked
- 10x wagering
- Clear wagering terms
50 Lucky Spins
TermsAutomatically credited on 1st Deposit (min £10). Game: Starburst, Spin Value: £0.1. WR 10x free spin winnings (only Slots count) in 30 days. Max bet is 10% (min £0.10) of the free spin winnings or £5 (lowest applies). Bonus Policy applies.- UK licence checked
- 10x wagering
- Free spins included
23 Free Spins upon Registration on Big Bass Bonanza. Deposit & Wager £10 and Receive 77 Cash Spins on Big Bass Bonanza
Terms18+, New UK players only | 23 No Deposit Spins Winnings Have 10x Wagering Requirements | Max Cashout on No Deposit Spins is £100 | Cash Spins Winnings Are Wager-Free | No max cash out on Cash Spins | Eligibility is Restricted for Suspected Abuse | Skrill Deposits Excluded | Spins Value Are £0.10 Per Spin | All Spins Expire in 48 hours |- UK licence checked
- 10x wagering
- Free spins included
100% up to £25 +100 Free Spins on Book of Dead
TermsAutomatically credited upon deposit. Cancellation can be requested. First Deposit Only. Min. deposit: £10, max. Bonus £25. Maximum amount of Free Spins is 100. Game: Book of Dead, Spin Value: £0.1. WR of 10x Bonus amount and Free Spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings and bonus amount or £5 (lowest amount applies). Spins must be used and/or Bonus must be claimed before using deposited funds. Bonuses do not prevent withdrawing deposit balance. Bonus Policy applies.- UK licence checked
- 10x wagering
- Withdrawal-friendly cashier
100% up to £50 + 50 free spins (Bonus Code: LUNA)
TermsAutomatically credited upon deposit. Cancellation can be requested. First Deposit Only. Min. deposit: £10, max. Bonus £50. Maximum amount of Free Spins is 50. Game: Book of Dead, Spin Value: £0.1. WR of 10x Bonus amount and Free Spin winnings amount (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings and bonus amount or £5 (lowest amount applies). Spins must be used and/or Bonus must be claimed before using deposited funds. Bonuses do not prevent withdrawing deposit balance. Bonus Policy applies- UK licence checked
- 10x wagering
- Withdrawal-friendly cashier
80 free spins on 1st deposit, no wagering
TermsThis offer is only available for first time depositors. Min deposit is £10. 50 Free Spins on Book of Dead. Spin Value: £0.10. After your first deposit you may claim your 30 Extra Free Spins by visiting the Kicker Section. The Prize Twister awards a random prize of either cash or free spins. For Free Spins the general free spins terms apply. No min withdrawal. This offer cannot be used in conjunction with any other offer. This offer is only available for specific players that have been selected by PlayOJO. If you have arrived on this page not via the designated offer via PlayOJO you will not be eligible for the offer. OJO’s Rewards and Game Play policy applies.- UK licence checked
- Cash winnings
- Withdrawal-friendly cashier
Deposit and wager £10 for 100 cash spins (at 10p)
TermsNew players only | Deposit & wager at least £10 to get free spins | Free Spins winnings are cash | No max cash out | Eligibility is restricted for suspected abuse | Skrill deposits excluded | Free Spins value £0.10 per spin | Free Spins expire in 48 hours |- UK licence checked
- Cash winnings
- Free spins included
100% up to £25 + 50 Free Spins
TermsAutomatically credited upon 1st Deposit (min £10). Max Bonus £25. Game: Big Bass Bonanza, Spin Value: £0.1. WR 10x Bonus (only Slots count) in 30 days. WR 10x free spin winnings (only Slots count) within 30 days. Max bet is 10% (min £0.10) of the free spin winnings and bonus or £5 (lowest applies). Bonus Policy applies.- UK licence checked
- 10x wagering
- Free spins included
100% up to £25
TermsAutomatically credited on 1st deposit (min £10)• Max bonus £25• Wagering: 10x bonus (slots only)• Wagering period: 30 days• Max bet: 10% of bonus (min £0.10) or £5 (whichever is lower)• Bonus Policy applies- UK licence checked
- 10x wagering
- Clear wagering terms
Triple Edge Studios – The Developers of Book of Oz Slot
Triple Edge Studios are babies! The company is just two years old, but it has a long history because it is part of Microgaming.
Triple Edge is one of 10 studios that have a link with Microgaming, producing exclusive content for them.
This is something more and more giant companies are doing. One: the big companies have plenty of cash, so they can buy up or sign deals with smaller companies; and this outsources game development to independent (or quasi-independent) entities, with the hope that these smaller, usually younger companies, will have the agility to be innovative. The studios get a link with one of the giants of the industry and could see their titles become massive hits.
The biggest title from Triple Edge Studios thus far has been this title (released in December 2018), but they’ve also hit big with Lara Croft Temples and Tombs, Ancient Fortunes: Zeus, Book of Oz Lock ‘n Spins, and African Quest.
The company innovates with great new game features, but their games – including their big Playboy tie-ins released via Microgaming – also look fantastic.
The Facts and Figures about Book of Oz Slot
The theoretical return to player on Book of Oz is 96.31%. This is a good figure and slightly above what we’d expect: most games are around 96%, and high volatility slots often have slightly lower figures. RTP is not a scientific prediction of how your game session will go though, it is a long-term measure that assumes behaviours on behalf of the player and could vary wildly from how you do – in either direction.
High volatility usually means big prizes, because highly volatile games are expected (again, it’s not a guarantee) to pay out bigger prizes but to do so less often. The maximum prize on Book of Oz is 25-times your stake, and you can bet as much as £25 on this title, from a 10p start. You’ll be wagering on 10 pay lines – a low number.
The game plays on a standard reel-set, and you can enjoy it on any device that supports HTML5 and JavaScript.
The Game
No slot player wants to spend ages learning arcane new control methods, so you’ll be pleased to see a really elegant and simple button set at Book of Oz.
Front and centre is the big, green spin button, flanked by the Max bet and Autoplay functions. To the left, the player sets the bets, and at the far left of the screen is the menu.
Payouts
The pay-table tells you all you need to know with regards to prizes, at least until you hit the bonus features.
It opens with the usual card symbols, starting at 10s, before climbing into the high-payers with a key, a book, a lion’s head, and a wizard.
There is also a scatter – a golden book – expanding symbols, and a wild (the Oz symbol).
There’s a good range of prizes even on the base symbols, with 10s paying from 0.25 to 5-times stake, and the top-hatted wizard paying 0.5, 5, 50, and 250-times stake.
Book of Oz Slot Bonuses
The bonuses here are many and varied!
We’ll start with a standard scatter-triggered free spins round.
Three of the gold Oz books trigger 10, four trigger 12, and five trigger 25 free spins.
At the start of the free spins round one symbol is designated as special, and will expand to complete wins when appropriate. It is via this symbol that the 5,000-total-bet top prize can be won.
The scatter also pays out in its own right.
Respins are unique. At the end of a spin, you can pay to respin any reel and continue to do so for as long as you are willing to stump up the cash. We haven’t seen a respin feature like this in any other game.
The Verdict
If originality was the aim for Microgaming’s gathering of smaller studios then Triple Edge have really come up trumps with this title, which is a hit two years after its release.
The look and feel are worth the entry price alone, but the innovative extra features make it worth your while to stay around.
Big paying free spins rounds are always welcome, but so are unique new ideas and the buy-in respins are certainly that. Remember, if you are buying features to keep an eye on your balance and to always play safely.
Hit the biggest win in the free spins round – complete with expanding symbol – and you could walk away with an impressive £125,000.
Cloaked in a great atmosphere and already spawning another sequel, with another very special bonus feature, Book of Oz slot has already shown it’s magical and that its developers are wizards of the reels. More of the same, please!
Book of Oz Slot: Comprehensive Data Analysis
Core Game Specifications
| Attribute | Value |
|---|---|
| Developer | Triple Edge Studios (via Microgaming) |
| Release Date | 2018-12-11 |
| Theme | Fantasy, Magic, Wizard of Oz |
| Layout | 5×3 |
| Paylines | 10 |
| Bet Range | 0.10–25 (currency varies) |
| Core Mechanics | Wild/Scatter Book symbol, Free Spins with Expanding Symbol, Paid Respin feature, Retriggerable Free Spins |
| Technology | HTML5, mobile‑optimized |
| Platform | Available on PC and mobile |
Mathematical & Payout Model
Return to Player (RTP)
Volatility
Hit Frequency
Max Win Potential
Symbols & Paytable Hierarchy
| Tier | Symbol(s) | Function & Value |
|---|---|---|
| Low Tier | 10, J, Q, K, A | Provides small, frequent wins to maintain gameplay. |
| Mid Tier | Heart Potion, Key Potion, Courage Potion | Thematic items offering moderate payouts. |
| High Tier | Wizard | Highest paying symbols. Top hits available with full combinations. |
| Wild | Book (also Scatter) | Acts as a substitute / feature trigger per game rules. |
| Scatter | Book (also Wild) | Triggers free spins / bonus round when enough appear. |
Book of Oz Bonus Features Mechanics
| Feature | Trigger | Initial Award | Core Mechanic | Enhancement/Retrigger |
|---|---|---|---|---|
| Free Spins with Expanding Symbol | 3+ Book symbols | 10/12/25 free spins | Random symbol expands to cover reels on wins | Retriggerable free spins |
| Paid Respin | After any base spin | Pay to respin a single reel | Helps complete wins or trigger Free Spins |
Frequently Asked Questions (FAQ)
| What is the RTP of Book of Oz? | The RTP is approximately 96.5%. |
| What is the maximum win? | You can win up to 5000× your bet. |
| How do Free Spins work? | Landing 3, 4, or 5 Book symbols awards 10, 12, or 25 free spins, with a random Expanding Symbol and retriggers possible. |
| What is the Respin feature? | After any base spin, you can pay to respin a single reel to try to complete a win or trigger Free Spins. |
| Can I play on mobile? | Yes, the game is HTML5‑based and optimized for both mobile and desktop play. |
| Who developed Book of Oz? | It was developed by Triple Edge Studios and released via Microgaming. |
| How volatile is the game? | It is high volatility (some sources describe it as extreme). |
| How many paylines does it have? | It has 10 fixed paylines. |
Book of Oz Performance Summary: Strengths vs. Weaknesses
Strengths
- High max win potential (5000×)
- Engaging Expanding Symbol Free Spins
- Unique paid Respin mechanic
- Mobile‑friendly design
Weaknesses
- High volatility may deter casual players
- Respin feature can be costly
- Only 10 paylines limits base game win patterns
Overview
Book of Oz is a high‑volatility 5‑reel, 3‑row slot with 10 paylines, developed by Triple Edge Studios and released in December 2018. It features a dual Wild/Scatter Book symbol, a paid Respin mechanic, and Free Spins with a randomly chosen Expanding Symbol. The RTP is around 96.5%, and the maximum win is 5000× your bet.
- 10 Football Slots for World Cup 2026 – chosen by experts (Free Demos) - July 1, 2026
- Best 7 Cluster Pays Slots UK – Free Demo Picks - July 16, 2026
- Best 8 High Volatility Slots in the UK - July 1, 2026
