Do you play D&D or Pathfinder? Tired of spending hours preparing for an RPG session? This book provides tips and advice you need to become a no-prep gamemaster. It is organized into three Arcana, Three Keys, and Arrows in the Quiver. The Arcana section deals with my history and struggles with learning how to gamemaster and why I decided to stop preparing for sessions. The Three Keys section is the heart of the No-Prep Gamemaster. These short chapters provide the framework on which anyone can begin to gamemaster without preparation. Arrows in the Quiver is a selection of tips and tricks that a GM can use at any time to cut down preparation time.