Here, oil rivers shimmer like gold under the sun, while derricks fuel up this new game with strong luck to players! The new Book of Oil slot is designed as the most exclusive piece of jewelry, being filled with an endless wealth of classy Oil Tycoons. Released by Endorphina right in time for the most golden time of the year, this game has 10 lines, 5 reels, and 3 rows, bridging timeless mechanics with black-and-gold perfection. In addition, a Bonus Pop feature is available here. Surrounded by all the golden beacons, this mighty treasure shines so bright, that the stars become dim. The Book symbol acts as Scatter and Wild, revealing the craziest wins of all time. Players also get hypnotised by the Oil Tycoon symbol and the stunningly bright symbols of Oil Derricks and Tanks which promptly dance on the reels. All together, they create an incredible upper-class feel within the Book of Oil game. When three Scatters land on the reels, they trigger 10 Free games with an expanding symbol. At the beginning of the feature, a special symbol is randomly selected. During the Free games, the Wild cannot substitute for the special symbol. Special symbols expand after the payout of regular symbols. The expanding symbol pays for combinations of a kind in adjacent and non-adjacent positions, and only on enabled paylines. Free games can be won again during the feature. It’s time to grab that unique chance and be challenged in the Book of Oil game! Are you ready to turn that oil crane on and get filthy rich unlike ever before?