From publisher blurb:
This handy and comprehensive Dungeons & Dragons book is intended as a quick rules reference. It contains the complete core rules for the 4th Edition Dungeons & Dragons Fantasy Roleplaying Game.
In addition to providing an overview of the game and how it’s played, this book presents the core rules in a format that is easily referenced during a game. It includes information on level advancement, combat, experience points, treasure, skills, equipment, and more.