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Book of Oz: Lock 'N Spin is a fantasy slot on a 5x3 grid with 10 fixed paylines. The design uses emerald, gold and purple artwork, with themed symbols including the Book scatter, a top-hatted character, potion bottles and classic card values. The game can be opened in a demo version to play for free and practice before playing for real money.
In the base game, the Lock 'N Spin mechanic allows players to lock up to four reels for the next spin, with the locked reels increasing the total stake. Only wins formed on the unlocked reels are paid, which adds a tactical element to the standard slot format. A 2nd Chance feature is also listed in the paytable.
Free Spins are triggered by 3, 4 or 5 Book symbols, awarding 10, 12 or 25 spins. At the start of the bonus round, one symbol is selected to expand during Free Spins, filling whole reels and creating additional winning combinations. The result is a slot built around scatter-triggered bonuses, reel locking and expanding symbols.
