Series
Book of series
Pragmatic Play's Book of series is an ancient-jungle, high-volatility franchise built around a 5x3 grid, 10 paylines, free spins and expanding symbols. Its identity comes from keeping that book-slot engine stable while changing how special symbols and bonus access shape the route to a roughly 5,500x ceiling.
Ranked by Slot Score
| Game | Year | RTP | Volatility | Slot Score |
|---|---|---|---|---|
 Book of El DoradoPragmatic Play | 2021 | 96.5% | High volatility | 72 |
 Book of Aztec KingLatestPragmatic Play | 2022 | 96.5% | High volatility | 74 |
Pragmatic Play Book of series: mystery symbols or bonus access
Book of El Dorado establishes the formula with mystery symbols, expanding symbols and the possibility of additional free spins. It lists a 96.5% RTP and a 5,500x maximum, concentrating the variation inside symbol transformation rather than adding a separate purchase route.
Book of Aztec King retains the same grid, payline count, RTP and high-volatility profile. Its 5,533x maximum is only slightly higher, so the meaningful change is functional: a wild symbol and bonus buy join the expanding-symbol and extra-spin structure. The sequel preserves the original risk level but gives the player another route into its main feature.