The doors to the mysterious pyramids and the treasures that lie within are open to you in the Book of Ra ™ Deluxe slot machine game. With 10 paylines across 5. Free Book of Ra Deluxe online slot in your web browser. Book of Ra Deluxe casino game from Novomatic just for fun or find the best online casinos and play. 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.