Book of Aztec is a 2016 release from Amatic Industries that maps the company’s craft onto the book-slot format — a template that was already proven across the industry by the time Amatic brought it to the Aztec theme. The architecture is immediately recognisable: five reels, three rows, ten paylines, and a single symbol that functions simultaneously as the game’s wild and its scatter. What Amatic adds is a visual palette rooted in pre-Columbian Mesoamerican imagery — stone carvings, jaguar motifs, ancient artefacts — rendered in the studio’s characteristically clean illustrative style.

The Book of Aztec itself is the pivotal symbol. As a wild it substitutes for every other symbol on the grid; as a scatter it pays independently of payline position. Landing three or more books anywhere on the reels triggers the bonus round. The bet range runs from $0.04 to $100, and high volatility is the defining characteristic of the math model — a natural consequence of concentrating prize potential into a single expandable symbol mechanic.

The Free Spins round awards 10 spins and, before they begin, a symbol is randomly selected to become the expanding symbol for the duration of the bonus. On every spin during the feature, that chosen symbol has the potential to expand and cover entire reels when it appears, creating the large line wins that define the book-slot format’s appeal. The expanding symbol can be any regular icon — the highest-paying symbols produce the most dramatic results when selected. This mechanic is the primary driver of the game’s 5,000x maximum win.

RTP is 95.08% and volatility is high.

Book of Aztec applies the book-slot blueprint competently and adds genuine visual character through its Mesoamerican theme. Fans of the format who want a provider alternative to the Egyptian-dominated variants will find Amatic’s execution reliable, if not genre-defining.