Thus, it is no wonder that the theoretical win probability (Return-to-Player ratio) is relatively high.99. Thrills Casino has a minimal responsive design which makes it easy for players to access the casino on any device. Slot Theme, the Book ofRa Deluxe is the second addition of the famous. In order to do so, the player must choose the correct colour of a card drawn from a virtual deck. Winning in Book of Ra Deluxe. Book of Ra is a 5-reel video slot with a fantastic audio-visual twist. Thrills offers players the best in customer service around the clock. Thus, mobile gaming is a breeze and players can access the casino on any smartphone device including Android mobiles and tablets, iPads and iPhones. Additionally, with the Special Bonus Expanding Symbol, you can multiply your free-spin generated wins. Three Book of Ra symbols in any reel will open the free spin bonus feature, giving 10 free spins. Along with its strong Egypt theme the slot also comes with a classic look and feel. Book of Ra developer Novoline was cognizant of the fact that the online casino industry had become an incredibly competitive marketplace where satisfying players required more creativity and stronger incentives. If you are looking for a chance to indulge your inner child, Thrills Casino is the perfect playground. The golden Book of Ra is the Wild Symbol and will substitute for all symbols in case of a non-completed winning line.