Book of Oil is a video slot developed by Endorphina that follows the well-worn path of book-style slots, blending classic card symbols with an oil-industry theme. With a published return-to-player (RTP) of 96% and high volatility, it sits firmly in the camp of games designed for players who prefer less frequent wins that tend to carry greater weight when they do land.
Theme and Visual Style
The oil theme gives this title a grittier, more industrial feel than the Egyptian or adventure settings that dominate the book-slot genre. Expect imagery tied to the petroleum world alongside the standard low-value card symbols – typically ten through ace – that are common in games of this type. The book itself serves as the central symbol around which the mechanics of the game revolve, as is conventional for the format.
Gameplay and Mechanics
Book of Oil follows the structure that players familiar with book-style slots will recognise. The grid is typically compact, and the book symbol usually functions as both a wild and a scatter. Landing a qualifying number of scatter symbols anywhere on the reels typically triggers a free spins round, during which one symbol is selected at random to expand across entire reels when it appears – a mechanic that gives this style of game its characteristic big-win potential.
Given the high volatility rating of 5 out of 6, players should expect longer dry spells between significant payouts. The 96% RTP is a reasonable figure for this category, meaning that over a statistically large number of spins the game is set to return 96 pence for every pound wagered, though actual session results will vary considerably.
Who Is This Game For
Book of Oil suits players who are comfortable riding out variance in exchange for the possibility of landing larger individual wins. It is not well suited to those who prefer steady, incremental returns. The high-volatility profile means that bankroll management is particularly relevant here, and session lengths can be unpredictable.
Key Stats at a Glance
- Developer: Endorphina
- Category: Video Slot
- Theme: Oil industry, book, card symbols
- RTP: 96%
- Volatility: High (5 out of 6)
As with any game of chance, setting a budget before you play and sticking to it is a straightforward way to keep sessions enjoyable.
Frequently Asked Questions
What is the RTP of Book of Oil?
Book of Oil has a published RTP of 96%, which is in line with the industry average for video slots.
Is Book of Oil high or low volatility?
It is rated high volatility, scoring 5 on a scale of 1 to 6. This means wins tend to be less frequent but potentially larger when they occur.
What is the main bonus feature in Book of Oil?
Like most book-style slots, it typically includes a free spins round triggered by scatter symbols, with an expanding special symbol selected at the start of the bonus round.
Who developed Book of Oil?
Book of Oil was developed by Endorphina, a studio known for producing book-themed and classic-style video slots.
