Play Book of Ra slot game without real deposits and enjoy the demo version online. It is the of Ra slot. This game can be played at 9 pay lines with 5 reels. Minimum lines: 1. Max lines: 9. This game is different than the others. Playing 7 lines for example, is actually recommended if you increase the bet per line. Play the popular Book Of Ra slot game by Novomatic here at OCV for free at bookofrakostenlosonlinespielen.win or play the original 9 - line version on GFM's Book Of Ra page.