From publisher blurb:
Each book in the Echelon Reference Series is written to be a complete reference for a single topic.
This book focuses on the sorcerer class, arcane spell casters who have magic in their blood.
In this book you will find 12 archetypes, 35 class features, 247 class subfeatures (including about 100 bloodlines, 22 wildblood bloodlines, and 125 hexes---gain via the Strega archetype), and 27 feats, all accessible or directly related to the sorcerer class. Also, 41 stat blocks for a mix of NPCs of levels 1-20, and monsters with levels in the sorcerer class.
This book contains material from the PRD and from third-party publishers.