Have the best online casino experience with Grosvenor when you play Book of Ra Deluxe. Immerse yourself in the Book of Ra Deluxe slot machine game. . Licensed and regulated by The UK Gambling Commission for customers in Great. Book of Ra Deluxe Slots Enter the mysterious world of the pyramids with this 10 This website is owned and operated by Genting Casinos UK Limited who is. Not many European slots regulars will need an introduction to Novomatic's popular Book Of Ra slots - they have a place in virtually every land-based casino.