Book Of... slots

The Book symbol acts as a special symbol (often a Wild and Scatter) that triggers the bonus feature, usually Free Spins; during the bonus, one symbol type typically expands to cover a reel for bigger wins.

Free Spins are usually awarded when three or more Book symbols land anywhere on the reels, granting a set number of spins and sometimes expanding-symbol mechanics.

RTP is game-specific but generally in the mid-90s, and volatility is often high, offering big wins less frequently.

Most titles use five reels with around 10–20 paylines; you can usually adjust the total bet and lines per spin.

In many games, the Book serves as both a Wild (substituting symbols) and a Scatter (triggering the bonus).

Progressive jackpots are uncommon in Book Of games; most offer fixed top prizes awarded during the bonus rounds or base-game winnings.

Bet ranges vary by title, but you’ll often see a minimum around 0.10–0.20 per spin and a higher maximum depending on the game, with bet-per-line options.

Yes, these games are generally mobile-friendly and offer a free demo mode so you can try them without risking real money.