The mystical Book of Secrets acts as both Wild and Scatter. Land 3 or more anywhere to trigger the Free Spins feature while earning scatter pays up to 200x total bet. Book of 99 features a Wild book that also triggers expanding symbols, though its collection mechanic and 99% RTP distinguish it from traditional scatter-pay structures.
Receive 10 Free Spins when the sacred book appears. Before the spins begin, one symbol is chosen to become the Special expanding symbol, covering entire reels when enough symbols for a win are present. Book of Santa by Endorphina applies the same expanding symbol mechanic across its 10 free spins, though the game swaps ancient artefacts for festive Christmas imagery.
The adventurous archaeologist stands as the highest-paying regular symbol. Five across any active payline delivers a magnificent 500x bet multiplier, with payouts starting from just two matching symbols. In the expanding reels variant, premium character symbols scale differently as the grid unlocks additional rows, shifting the highest payout potential beyond fixed 500× multipliers.
Book of Secrets™ operates across 10 fixed paylines on a classic 5-reel, 3-row configuration. SYNOT Games has crafted this archaeological adventure with straightforward mechanics that reward both casual explorers and seasoned tomb raiders. The Book of Ra Deluxe slot from Novomatic shares this 10-payline structure and delivers medium to high volatility with expanding symbols during its free spins feature.
