From publisher blurb: Echelon Reference Series: Summoner collects information about the summoner and unchained summoner classes. The base classes, archetypes, eidolons (normal and unchained) evolutions (normal and unchained) and both spell lists are all contained within. This book also has feats appropriate to the class and its archetypes. This is the PRD-Only version, containing information from the PRD.