Best Book Slots (Expanding Symbols) 2026

Book slots pick a special expanding symbol before free spins; it expands to cover whole reels during the bonus. Book of Dead defined the genre.

We currently list 41 book slots (expanding symbols) from 6 studios, led by Thunderkick (10), BGaming (9) and Hacksaw Gaming (7). Across the 36 games with a published RTP, the average is 96.20%. Scroll of Adventure new has the highest at 97.10%, while Sword of Arthur is lowest at 94.34%. Max wins range from 2,000x up to 36,000x on Road Rage. Of the 29 games with a provider volatility rating, the most common ratings are very high (48%), high (31%) and medium (14%). 11 of them (27%) offer a bonus buy where it is legal.

41 slots match this list. Rankings use our editorial review score and the published game data; they are not paid placements.

1. Book of Dead – Play'n GO

Book of Dead is the template for the modern "book" slot. Ten free spins with a random expanding symbol is all there is, and that simplicity is its strength: the bonus outcome depends almost entirely on which symbol is picked. A high-paying expanding symbol can fill the screen, while a low one usually produces a modest bonus. Note the very wide range of RTP configurations – the in-game info screen tells you which one a casino runs.

96.21% RTP · High volatility · 5,000x max win

2. Legacy of Dead – Play'n GO

Legacy of Dead is a refined Book of Dead with a twist: landing more scatters gives you more expanding symbols in the bonus. That makes four- and five-scatter triggers genuinely exciting. Otherwise the experience is very familiar.

96.58% RTP · High volatility · 5,000x max win

3. Road Rage – Nolimit City

Road Rage is a traffic-jam slot on a 3-4-3-4-3-4-3 grid where every car is a wild with its own colour-coded effect. For example, the yellow Engine Breakdown car enlarges the other symbols.

96.03% RTP · High volatility · 36,000x max win

4. Book of Shadows – Nolimit City

Book of Shadows is Nolimit City's take on the book format, with a twist: Shadow Rows let you pay extra to add rows and win lines. More rows mean more frequent wins and bigger payouts, at a higher cost per spin.

96.01% RTP · High volatility · 30,338x max win

5. Sword Of Shoguns – Thunderkick

Sword Of Shoguns is a 6-reel samurai slot with 5,040 ways, expanding symbols, wilds and free spins.

96.15% RTP · Very high volatility · 25,200x max win