CASINOGPT
Book of Oz key art — Wizard of Oz themed slot by Triple Edge Studios, 2018

Slot Review

Book of Oz

Triple Edge Studios · 2018

Triple Edge Studios' 2018 take on the Book sub-genre, set in the Land of Oz. Wizard's book is wild and scatter; three or more triggers free spins with one expanding symbol — Dorothy, the Tin Man, the Cowardly Lion or the Scarecrow.

Quick facts

Studio
Triple Edge Studios
Distributor
Games Global
Released
2018
Reels × Rows
5 × 3
Paylines
10
RTP
96.31%
Volatility
High
Max win
5,000× stake
Min bet
$0.10
Max bet
$50.00
Theme
Wizard of Oz
Type
Video Slot

About the game

Book of Oz is Triple Edge Studios' 2018 entry in the Book sub-genre — the same framework popularized by Novomatic's Book of Ra and Play'n GO's Book of Dead. Triple Edge swaps the standard Egyptian theme for the Wizard of Oz, replacing scarabs and Pharaohs with Dorothy, the Tin Man, the Cowardly Lion and the Scarecrow. The math and mechanics are otherwise familiar to anyone who has played any Book slot.

Three Wizard's Book scatters trigger the free-spins round. Before the round begins, one symbol is randomly chosen as the expanding symbol — landing on at least three reels causes it to expand to fill the entire reel. The 5,000× cap is reachable when a high-tier expanding symbol covers three reels with a 10-line payout. High volatility, classic Book design.

Key features

  • Expanding symbol free spins
  • 10 free spins, retriggerable
  • Wizard's Book — wild and scatter
  • Gamble feature on wins
  • 10 fixed paylines, high volatility

Screenshots

Book of Oz base game screenshot — 5×3 reels
Base game
Book of Oz bonus round screenshot — free spins feature
Bonus round

Where to play

CasinoGPT's top-rated Ontario-licensed casinos. Book of Oz is available in the slot library at most of these operators.

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CasinoGPT lists Ontario-licensed (AGCO/iGO) operators only. We do not link to or endorse unregulated sites.

Frequently asked questions

What is the RTP of Book of Oz?
96.31% in the standard configuration — slightly above the Ontario industry average. Some operators may host lower-RTP variants; check the in-game info screen.
How does Book of Oz compare to Book of Dead?
Same Book sub-genre framework: three book scatters trigger free spins with one expanding symbol. Book of Dead (Play'n GO, 2016) is Egyptian-themed; Book of Oz is Wizard of Oz themed. Math is broadly comparable — both ~96% RTP, high volatility, ~5,000× max win.
How does it differ from Book of Oz Lock 'N Spin?
Lock 'N Spin (2019) keeps the same Book mechanics but adds a feature where high-paying symbols can lock in place during the base game and trigger a respin. The base Book of Oz reviewed here is the original, simpler version.
Is this slot legal to play in Ontario?
Yes — provided you play at an iGaming Ontario / AGCO-licensed operator. The casinos listed above are Ontario-licensed. Playing on unregulated international sites from within Ontario is not legal and offers no consumer protections.

About the Expert: Andre Weston

Andre Weston - iGaming Industry Expert

Andre Weston | iGaming Industry Consultant

Andre Weston is an online casino industry expert with over 20 years of experience spanning casino operations, payments, player protection, fraud prevention, VIP management, and platform integrity. His expertise is grounded in real operational experience inside major global online casino environments, combined with extensive firsthand player experience across dozens of platforms worldwide.

19+ only. Online gambling in Ontario is regulated by AGCO and operated through iGaming Ontario. Play responsibly. If gambling is no longer fun, help is available at ConnexOntario (1-866-531-2600, 24/7).