Book of oil is a five-reel, three-row video slot game with 10 paylines. The game offers a maximum jackpot of 2,500 coins and has a return to player percentage (RTP) of 96.2%. The game is set in an oil field and features symbols such as oil rigs, barrels of oil, and trucks.

The objective of the game is to land winning combinations by spinning the reels. Winning combinations are formed from left to right on active paylines. To start playing, simply select your bet amount and press the spin button. You can also use the autoplay function to set the reels to spin automatically for a selected number of spins.

Book of oil is a medium to high variance game, which means that it offers the potential for big wins, but also has a higher risk of losing your bankroll. The game’s RTP is on the lower end of average, but this is to be expected with a medium to high variance game.

The game’s biggest draw is its bonus feature, which is triggered by landing three or more book symbols anywhere on the reels. When this happens, you’ll be taken to a second screen where you’ll see a grid of symbols. You’ll need to choose one of these symbols, which will then award you a number of free spins. During the free spins round, any wins are multiplied by three. This means that there’s the potential to land some huge wins during the bonus feature.

Overall, Book of oil is a fun and exciting slot game that offers the potential for big wins. The game’s medium to high variance means that it’s not for the faint-hearted, but if you’re looking for a game with the potential for huge payouts, then this is definitely one to try.