Play Book Of Ruby, casino game by Retro Gaming. There are no limits to your winnings with a mind-blowing 5000x multiplier. This game has 10 paylines and comes with unbelievable bonuses. High volatility and a 96% return to the player all make for an exciting time. Book Of Ruby offers a free demo to let you try out our features. We hope that you like what you see and decide to take us for a spin! We have a large selection of casino games for you to choose from. Play on desktop or mobile, and get huge payouts along the way.