Cleo's Book by Parimatch. . Cleo's Secrets is a 6-reel, line online slot game with bonus round, bonus spins, instant play, autoplay, video slots, multiplier, wild symbol. Join slots casino at Parimatch ☝ Access the most thrilling slots and other casino games ☝ Win huge jackpot at Parimatch! Try and win at Cleo's Book by Parimatch! Get the best online slots experience here! Cleo's Book by Parimatch.