Searching for an honest Book of Fire review before you commit real money? You're in the right place. This is a Merkur game, sitting firmly in the a medium low-variance maths model bracket and paying back 95.98% RTP. If everything lines up, Book of Fire can pay up to 5,000x your bet. Visually it's wrapped in a book of theme, with the action running on 40 paylines across 5 reels. Expect a hit frequency around 30%, which sets the rhythm of play. The full verdict is below.
Written by James Holloway · Last updated: January 2026
Book of Fire comes to us from Merkur, dressed up with a book of theme. It runs on 5 reels and 40 paylines with a medium low volatility profile, and a published RTP of 95.98%.
Where Book of Fire earns its keep is the feature set. Look out for scatter symbols that unlock free spins and extra bonus rounds. Thanks to its medium low variance, wins come often enough to suit casual, lower-risk play. Overall it's a well-rounded slot that knows what it is.
At 95.98%, the RTP is slightly below the industry average of ~96%. While this is typical for many popular slots, players should be aware of the slightly lower theoretical return.
Medium-low volatility offers a good balance of regular wins with occasional larger payouts. Expect frequent hits with modest amounts, suitable for casual players who want low-risk entertainment.
About 1 in 3 spins results in a win. This is a moderate hit frequency that balances win frequency with payout size.
Book of Fire features scatter symbols that can trigger free spins rounds. Landing the required number of scatter symbols anywhere on the reels activates the free spins feature, giving you extra chances to win without additional bets. During free spins, special modifiers may apply to boost your winning potential.
3.0 / 5 — Good
Book of Fire by Merkur is a solid offering that delivers good entertainment value. The 95.98% RTP combined with medium low volatility creates a well-balanced gaming experience.