Book of Cats is a medium-to-high volatility slot developed by BGaming, built on the classic Book of Ra formula — but with a thrilling twist. This Egyptian-themed adventure introduces an additional 6th reel paired with an exclusive Winline Expanding feature, effectively doubling the win potential compared to standard book-style slots. Add in the traditional expanding symbol bonus round, and you have a game that offers more firepower than most of its genre peers.
If the book slot genre were a survival contest, it would outlast almost everything else in the casino world. Book of Cats proves that point — delivering yet another Egypt-inspired chapter in the ever-growing saga of book-themed slots. Despite the feline name, don't expect an abundance of cute cats; the aesthetic leans firmly into ancient Egyptian mythology, just like countless book clones before it.
What sets this title apart, however, is the extra 6th reel that can expand alongside your base game wins — a mechanic that adds a fresh dimension to familiar gameplay. The math model presents an interesting trade-off: the high-value symbols create opportunities for bigger payouts, but the overall bankroll erosion over time is more pronounced than most competitors in the book slot category.
Overall, Book of Cats is a solid, if familiar, entry into the genre — one with a couple of genuine twists that certain players will find appealing.
In any book-style slot, the expanding symbol selected at the start of the bonus round is the defining factor — it can either deliver massive rewards or leave you empty-handed. Our 200-spin session captured a range of outcomes across both the base game and the bonus round.
Check out the video below to see the full session in action and judge the potential for yourself.
So, what's the final word on Book of Cats? At its core, this is another entry in the crowded book slot catalogue — this time themed around sacred Egyptian cats. But a few standout characteristics make it worth considering:
In summary, Book of Cats delivers twice the win ceiling of a typical book slot, alongside a more balanced volatility profile than many genre rivals. The Winline Expanding mechanic is a genuinely fresh idea. However, players should be aware that the long-term cost of chasing those bigger wins is measurably higher here than elsewhere in the book slot category.
