Book of Gates is Spinomenal’s 2019 take on the Egyptian book slot formula, and it delivers what fans of the genre come looking for without unnecessary complication. Set across a 5×3 grid with 10 paylines, it centres on the Book of Gates as both the wild and the scatter — an ancient tome that holds the key to the bonus round and substitutes for all standard symbols in the base game. Stakes range from $0.10 to $100, placing it in comfortable territory for most players.

The Egyptian atmosphere is handled well: hieroglyphics, gods of the afterlife, gold-edged playing card symbols, and a suitably dramatic soundtrack that ramps up when the bonus approaches. The layout is clean, and the 10-payline structure makes winning combinations easy to track. Base-game pays come in at a measured pace consistent with a high-volatility build, meaning patience is required between meaningful hits.

Landing three or more Book of Gates symbols anywhere on the reels triggers 10 Free Spins. At the start of the feature, one symbol is randomly selected to serve as the special expanding symbol for the entire bonus. Whenever that symbol appears during free games — regardless of how many positions it occupies — it expands to fill its whole reel. The expanding symbol mechanic can produce full-reel coverage across multiple columns when the chosen high-value icon lands in several places simultaneously, which is where the round’s biggest rewards live.

A Bonus Buy option is included for eligible markets, providing direct entry to the Free Spins without waiting for the scatter to show up naturally. At an RTP of 96.01% and high volatility, the game carries genuine risk-reward tension. The maximum win stands at 5,000x the stake, which is the target the free spins expanding mechanic is built around.

Book of Gates is a solid, well-executed Egyptian book slot from Spinomenal. It does not deviate far from the established template, but the expanding wild free spins are well-tuned and the 5,000x ceiling gives the bonus real purpose. Worth playing for those who enjoy the genre and are prepared for the variance that comes with it.