Book of Secrets is a 5-reel and 3-row slot machine created by SYNOT. The game is set across five reels and features an Ancient Egyptian theme. It features a Book of mechanics, Expanding Symbols, Feature: Substitution Symbols, FreeSpins, Gamble, Risk/Gamble (Double) game, Scatter symbols, and Wild. And you can win the maximum payout worth 1000 times of your stake if you are lucky enough. Learn more about this game in this review.