Book of Thieves is the Blue Guru-origin slot to test in free demo mode only after checking whether the build still loads. The useful angle is not just the Book format; it is the split between base-game expanding symbols and Free Spins expanding symbols.
Current source labels also need care. Older coverage names Blue Guru Games, while AboutSlots and AskGamblers surface Slammer Studios or former Blue Guru Games. AboutSlots also says the April 2023 title has been decommissioned.
Which Book of Thieves We Are Reviewing
This review covers Book of Thieves by Blue Guru Games, the 5-reel medieval thief slot released in April 2023. We treat Slammer Studios and former Blue Guru Games wording as the same title trail, not a second game.
The Blue Guru Book-slot catalogue context matters because this is the studio’s own entry in the wider Book-style slot family. It belongs beside the studio’s story-led catalogue, not beside unrelated Book of Dead or Book of Ra variants.
Some competitor pages mention Bragg, Oryx or Relax-style distribution context. That can explain where the game is hosted, but it should not replace the original Blue Guru attribution or the current Slammer label used by newer directories.
The quick identity check is a 5×3 grid, 10 winlines, medieval thief symbols, a Wild, a Book or Scatter symbol and expanding-symbol rules. If those elements are missing, the page may be serving another Book-themed slot.
5×3 Grid, 10 Paylines And Book Symbols
Book of Thieves uses a conventional 5-reel, 3-row layout with 10 paylines or winlines. That makes it a fixed 5-reel payline frame, even though public databases sometimes describe line options differently.
Wins are read from the left across adjacent reels. Low symbols include coins, a dagger and a goblet, while premium symbols are character portraits from the thief theme. The highest premium combinations are the main ordinary-line target.
The Wild is separate from the Book or Scatter symbol. Public sources describe the Wild as substituting for paying symbols, while the Book/Scatter role is tied to Free Spins access and the expanding-symbol feature path.
There is one small source conflict to keep visible. Casino Guru flags configurable winlines, while Chipy marks adjustable paylines as unavailable. We would settle that by checking the active paytable before treating line count as adjustable.
Expanding Symbol Spin In The Base Game
The base-game feature is the first reason this page should not be reduced to a spec table. AboutSlots and Gamblington describe a random paying symbol that can be chosen as a special expanding symbol during ordinary paid spins.
When the selected symbol lands in enough positions, matching instances can expand across the reel height. That behavior can create extra value beyond a plain left-to-right line read, depending on the active rules panel.
That distinction is the page’s main information gain. Book of Thieves is not just a slot where the Book triggers Free Spins; it can also use the expanding-symbol idea before the bonus round begins.
Free Spins, Retriggers And Bonus Buy
Free Spins trigger from three or more Book or Scatter symbols. The common source wording is 10 Free Spins, with the Book/Scatter acting as the access symbol rather than a normal paying icon.
Before the round starts, public sources say one to three paying symbols can be selected as expanding symbols. That makes the expanding-symbol Free Spins route more important than the theme copy around it.
Retriggers are also source-supported. Landing three or more Scatters during the feature can add another 10 Free Spins, so the round can extend if the Book symbols keep appearing in the bonus.
A 70x Bonus Buy appears in AboutSlots and Gamblington, but it should be treated as market-dependent. Operators may remove feature buys by jurisdiction, and decommission wording makes current access even less certain.
RTP, Volatility, Max Win And Availability
The RTP is versioned across sources rather than universal. Chipy lists 96%, Casino Guru and TempleOfGames show 96.06%, AboutSlots shows 96.08%, Gamblington shows 96.19% and AskGamblers/Bigwinboard show 96.21% for public data.
Volatility is also not clean. Chipy and Gamblington’s spec box call the game medium volatility, while LuckyMobileSlots and Gamblington’s prose move toward high or very high wording. We would call the label source-dependent.
Max-win data has the same split. AboutSlots says 4,786x, and Chipy’s $957,200 maximum at a $200 stake implies the same ceiling. Casino Guru lists 5,250x, while Gamblington and LuckyMobileSlots list 5,337x.
The common bet range is 0.10-200, but AboutSlots lists 0.10-100 and one LuckyMobileSlots table context shows 0.10-150. The active rules screen should settle bet ladder, RTP version and maximum-win version together.
The Blue Guru/Slammer casino profile helps with provider context, but availability is the bigger caveat. AboutSlots says Slammer Studios decommissioned Book of Thieves, so live play may be limited or absent.
Progressive jackpot wording should stay out of the main claim. Chipy marks Progressive unavailable, AskGamblers marks Progressive no, and the upside is better explained through expanding symbols, retriggers and the listed max-win range.
Who Should Try It Free
Book of Thieves fits players who like the Book-slot rhythm but want to inspect Blue Guru’s take on expanding symbols. The best demo check is watching whether the base game and Free Spins use the same symbol-expansion logic.
It is weaker for players who want live-casino certainty, clean single-source math or a more modern meter system. For that later Blue Guru contrast, the Otterly Amazing meter sibling is more mechanically layered.
Our Verdict
Book of Thieves deserves a cautious demo-first review because the public record is more conflicted than the simple format suggests. We would verify provider label, demo availability, RTP, bet range, max-win version and expanding-symbol behavior before comparing it with other Book-style slots.
- Try it for: a 5×3 Book-style setup with base-game and Free Spins expanding-symbol behavior.
- Check first: demo access, decommission status, RTP version, line controls, bet range and Bonus Buy availability.
- Skip it if: you prefer current promoted titles or slots with cleaner single-source math data.
