Book of Oz Lock ’N Spin slot
Book of Oz Lock ’N Spin is the sequel to Book of Oz, made by Triple Edge Studios for Microgaming and released in September 2019 on 5 reels and 10 paylines. Its book is wild and scatter in one, and three or more start free spins in which a special symbol expands on the reels. The sequel adds 2nd Chance: as those free spins begin, you can keep that symbol or reshuffle it for a chance to upgrade.
Editorial note: this guide explains how Book of Oz Lock ’N Spin works. Rules, features and payout figures are set by the studio and can differ between operators and game versions, so check the game’s information panel before you play. Slots are games of chance, and nothing here predicts results. Availability at Fortune Games can change.
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Book of Oz Lock ’N Spin: key facts
| Studio | Microgaming, developed with Triple Edge Studios |
|---|---|
| Released | September 2019 |
| Reels and paylines | 5 reels, 10 paylines |
| Maximum win | 5,000x stake |
| Top line payout | Ruler of Oz: 500x stake for five on a payline |
| Wild and scatter | The book: a wild on the paylines and the scatter that starts the free spins |
| Free spins | 10, 12 or 25 for 3, 4 or 5 books on one spin; three or more books during the free spins add further free spins |
| Special expanding symbol | Awarded as the free spins begin; it expands on the reels during the free spins |
| 2nd Chance | On entering the free spins: keep the special symbol, or reshuffle it for a chance to upgrade |
| Autoplay and turbo | Not available at sites licensed in Great Britain; UK rules require at least 2.5 seconds between the start of one game cycle and the next |
| Stakes | From 10p a spin in the studio’s range. UK rules cap online slot stakes at £5 a spin, or £2 if you are 18 to 24 |
| RTP | Shown in the game’s information panel |
| Series | Book of Oz (compared below) |
All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.
How Book of Oz Lock ’N Spin plays
Wins are paid on 10 paylines across the 5 reels, and the symbol at the head of the paytable is the ruler of Oz, a figure in a top hat. The book does two jobs: as a wild it stands in for other symbols to complete a payline, and as a scatter it starts the free spins once three or more turn up on the same spin. The special expanding symbol and the 2nd Chance choice both belong to those free spins rather than to the base game.
The Lock ’N Spin of the title is the name of Microgaming’s HyperSpins reel-lock feature, which appears only in versions of the game that include it.
Free Spins and the special expanding symbol
Three, four or five books on one spin trigger the Free Spins feature, worth 10, 12 or 25 free spins. The book also bestows a special symbol on the round, and during the free spins that symbol expands on the reels. Books keep working inside the feature: three or more on a free spin grant further free spins. As a worked example, four books open 12 free spins, the special symbol is settled as they begin, and three books on any of those 12 spins extend the same round.
2nd Chance
2nd Chance is the choice Microgaming introduced with this sequel, and it comes at the start of the free spins, once the special symbol has been shown. You can accept that symbol and play the round with it, or reshuffle for a chance to upgrade it to another. Whichever symbol stands when the spins get going is the one that stays active, and expands, for the rest of the round.
Book of Oz Lock ’N Spin compared with Book of Oz
Book of Oz came first, in December 2018, and the sequel kept its frame: 5 reels, 10 paylines and a book scatter that turns three, four or five books into 10, 12 or 25 free spins. Both games give those free spins a special symbol that expands on the reels, and their maximum wins are the same. The difference lies in how that symbol is settled. In Book of Oz the round simply plays with the symbol it is given, while the sequel opens its free spins with 2nd Chance, the option to keep the symbol or reshuffle it.
| Game | Released | Grid and lines | Special symbol in the free spins | Maximum win |
|---|---|---|---|---|
| Book of Oz Lock ’N Spin | September 2019 | 5 reels, 10 paylines | Expanding, with 2nd Chance to keep or reshuffle it | 5,000x stake |
| Book of Oz | December 2018 | 5 reels, 10 paylines | Expanding | 5,000x stake |
All values (Bet Levels, Maximum Wins etc.) mentioned in relation to this slot game are subject to change at any time.
Book of Oz Lock ’N Spin at Fortune Games
Book of Oz Lock ’N Spin is one of the slot games in the Fortune Games lobby (18+), with the first Book of Oz among the tiles above. The UK caps in the table apply to every player. There is no autoplay or turbo mode, as at every site licensed in Great Britain. Fortune Games has an app on the App Store and Google Play.
Frequently asked questions
How does the Book of Oz Lock ’N Spin slot work?
Every round begins as line play on 10 paylines, with the book as the symbol to watch. It has to land three, four or five times on the same spin to open the free spins. At that point the round is given its special symbol, 2nd Chance offers a reshuffle, and from then on fresh books can lengthen the round while the chosen symbol expands.
Is Book of Oz Lock ’N Spin a sequel to Book of Oz?
Yes. Microgaming launched it as the second chapter of its Book of Oz series, and Triple Edge Studios, the studio behind the first game, developed this one as well. It carries over the book scatter, the three free spins awards and the expanding symbol, and its own contribution is the 2nd Chance reshuffle at the start of the free spins.
Do you have to reshuffle the special symbol in Book of Oz Lock ’N Spin?
No. 2nd Chance is an option rather than a step: you can keep the symbol the book awards and go straight into the free spins with it. Reshuffling is only a chance to upgrade, so the symbol that comes back is not certain to be a higher one, and whichever you end up with stays in place as the expanding symbol until the round is over.
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Checked on 12 November 2026 against Microgaming’s launch announcements for Book of Oz Lock ’N Spin and Book of Oz, the SlotCatalog and LCB game records, and the Gambling Commission’s stake-limit guidance and remote technical standards. How we research and check our guides: our editorial policy.