Book Of Cats Slot Review

Book Of Cats is a ten-line Egyptian book slot from BGaming, released on 8 July 2020, built on the same expanding-symbol template that has kept this subgenre alive for two decades. The headline figures are a 96.99% RTP, very-high volatility, a hit rate of 2.78% and a ceiling of x8,202 the stake, capped at €246,060. The demo above is the same certified build the casinos run, with the real-money layer removed, so the reel strips, the free spins trigger frequency and the expanding symbol behaviour are all identical to the live game. That makes it a genuinely useful place to feel out the rhythm of the game before you commit a bankroll. Note that demo play cannot show you what a long real-money stretch feels like, because the thing that hurts in a game like this is not the maths, it is the money.

The core is a 5x3 grid with ten fixed paylines paying left to right, which by modern standards is a narrow window. Ten lines on fifteen positions means each spin has relatively few chances to connect, and that is deliberate: the paytable can then be top-heavy without breaking the RTP. Bastet leads the symbol set, followed by an Egyptian cast and card royals, and the Golden Book acts as both Wild and Scatter.

Before the base game begins, one symbol is randomly designated in the sixth cell above the reels. That symbol does nothing in the base game beyond sitting there as information. It is the symbol that will expand if and when you reach the free spins round, and it is re-drawn between rounds. Purists will recognise the structure immediately from the wider book family, and BGaming has not tried to reinvent it. What it has done is set the return higher than most of its own catalogue, which is the interesting part.

Base-game play is therefore simple to the point of being austere: spin, watch for three Golden Books, and collect the occasional line win in between. There is no cascade, no multiplier ladder, no respin. Everything the game has is stored in the bonus.

Free spins and the expanding symbol

Three or more Golden Books anywhere trigger ten free spins with the pre-selected expanding symbol. During the round, that symbol expands to cover three positions on its reel and pays regardless of adjacency rules on standard lines. Retriggers are available by landing three or more Scatters again inside the round, adding further spins. This is where essentially all of the game's variance lives. A round that draws a high-value symbol and lands it on four or five reels is what produces the four-figure multipliers; a round that draws a low card royal is close to worthless. The randomness of the symbol draw is a second layer of variance stacked on top of an already infrequent trigger.

Scatter and Wild in one

The Golden Book doubling as Wild means it can complete base-game line wins as well as build towards the trigger. In RTP terms this is a small but real contribution to the base game, and it slightly softens what would otherwise be an extremely thin non-bonus return.

Buy Bonus

You can purchase the free spins round directly at the price shown on the button. BGaming does not publish the cost multiple or the RTP of the purchased round in its public materials, and that matters: on many book slots the bought version returns a slightly different figure to the base game. Buy features compress the timeline of a very-high-volatility game, which means your bankroll meets the variance faster in both directions. It is a convenience tool, not an edge.

Gamble

After any base-game win you can gamble on the colour or suit of a face-down card to double or, on suit, multiply further. Gamble rounds are typically close to RTP-neutral, so they do not add expected value; they simply widen the distribution of your outcomes. If your goal is to make a modest bankroll last, gambling every win works directly against that.

The 96.99% RTP is the strongest single argument for this game. Against BGaming's own range it sits near the top of the standard tier, above Bonanza Billion at 95.97%, Snoop Dogg Dollars at 96.00% and Gold Rush – Johnny Cash at 96.14%. Only outliers such as Aztec Clusters at 99% beat it meaningfully. Roughly a point of RTP over a rival is not something you will feel on any given evening, but over thousands of spins it is the difference between a slow bleed and a faster one. Always check the RTP displayed in the paytable at the casino you use, because operators sometimes deploy alternative configurations.

The 2.78% hit rate is the number that should shape your expectations. That is roughly one paying spin in every thirty-six. Put plainly: long stretches of nothing are the normal state of this game, not bad luck. Compare it with Hot Chilli Bells at a 9% hit rate, where something lands nearly every eleventh spin, or Wild Cash at 12.28%, where the reels feel constantly active. Book Of Cats is closer in feel to Gold Rush – Johnny Cash at 2.39%. If you are the sort of player who finds a silent screen stressful, this maths will not suit you regardless of how good the RTP looks on paper.

The x8,202 ceiling is real but should be treated as a lottery outcome rather than a target. It requires the expanding symbol round to align almost perfectly, and the €246,060 figure implies a €30 maximum stake — a level most recreational players will never set. At €0.20 a spin, the same multiplier is worth about €1,640, which is a more honest picture of what a very good outcome looks like for a typical bankroll.

Practically, a very-high-volatility game with a sub-3% hit rate needs a session bankroll of several hundred base bets to have a reasonable chance of surviving to a meaningful bonus. Sizing down your stake is the only real lever you control here.

This suits players who already enjoy the book format and understand what they are buying: a base game that mostly serves as a waiting room, and a bonus that carries the entire outcome. If you like clean, legible maths, ten lines and no distracting side mechanics, the structure is honest and the RTP is above the studio's average.

Skip it if you play short sessions on a small budget, if you need frequent small wins to stay engaged, or if you are drawn in by the x8,202 figure without reading the 2.78% next to it. Players in that position are far better served by something like Hot Chilli Bells or Burning Chilli X. You will find Book Of Cats stocked widely at casinos carrying BGaming, so there is no scarcity pressure to play it at a stake you are not comfortable with. This is entertainment for over-18s only and should never be treated as a source of income.

Book Of Cats is a competent, unambitious book slot lifted above its peers by a genuinely good 96.99% return. Nothing about the design is original — the expanding symbol, the buy option and the gamble are all standard furniture — but the numbers are more player-friendly than most of BGaming's very-high-volatility catalogue. The 2.78% hit rate is the price of admission, and it is a steep one. Rated as maths rather than as theme, it earns a solid mark; rated as a session experience for the average bankroll, it is demanding.