Book of Oil
About Book of Oil
Book of Oil is a 2021 release from Endorphina that transports players to the Texas oil fields of the early 20th century. The reels sit against a dusty desert backdrop, with derricks, rig workers, and barrels populating the paytable. The visual style leans toward vintage Americana, using warm browns and metallic accents that evoke the boomtown era. The gameplay centers on the familiar "Book of" mechanic, where a special expanding symbol comes into play during free spins. Before the bonus round begins, one regular symbol is randomly selected to expand and cover entire reels when it lands, paying on all active lines regardless of position. The book symbol serves dual duty as both wild and scatter, triggering ten free spins when three or more appear. Players can adjust stakes across an exceptionally wide betting range, from modest wagers up to high-roller levels. A gamble feature offers the chance to double winnings by guessing a hidden card's color. The overall pace is deliberate, matching the methodical rhythm of oil extraction itself.
| Category | Slots |
|---|---|
| Provider | Endorphina |
| Bet range | $0.10 – $1000 |
Game features
- Eligible for promo free-spin offers
How to play Book of Oil
- Set your stake using the bet selector. Range is $0.10 to $1000 per spin.
- Adjust autoplay if you want to spin multiple rounds back-to-back.
- Hit Spin and watch the reels. Winning combinations pay out automatically.
Play Book of Oil for Real Money
Book of Oil FAQ
Can I try Book of Oil for free?
Yes — Book of Oil is available in demo mode at PlayMind, no account or deposit required. Demo play uses fake credits and is identical in mechanics to real-money play, so you can learn the game before committing funds.
What is the RTP of Book of Oil?
Endorphina has not published an official RTP for Book of Oil. Most Endorphina slots publish RTP between 95% and 97% — check the in-game info panel for the exact figure.
Is Book of Oil mobile-friendly?
Yes. Book of Oil runs in any modern mobile browser — iOS Safari and Android Chrome both work without an app install. The reels and bet controls adapt automatically to portrait or landscape.
How do I deposit to play Book of Oil for real money?
Open the Cashier from any page, pick a cryptocurrency (USDT on BSC is fastest and cheapest), copy the deposit address shown, and send funds from your wallet. Deposits credit in 1-10 minutes depending on the network.
More games from Endorphina
Games like Book of Oil
Explore more
Play responsibly. Book of Oil is a game of chance — outcomes are random and losses are part of play. Set deposit and session limits before you start, never chase losses, and use our responsible gaming tools (limits, timeouts, self-exclusion) if play stops being fun. 18+ only.