Novomatic Book of Ra. Book of Ra is one of the top games manufactured by Novomatic and is a top place in the top 10 Gaminator games. Every gaminator. Based on the older Novomatic favourite Book of Ra this 5 reel, 10 pay line slot game is based on a similar character to that of Indiana Hones the Egyptian style. Play free online Book of ra Slot the most popular slot game.