From the back cover:
THE WORLD NEEDS HEROES.
In a fantastic world of magic and monsters, a new age of adventure unfolds. This core rulebook for the Dungeons & Dragons® Roleplaying Game provides everything players need to create and run heroic characters through legendary dungeons of dread.
The Player's Handbook® features the 4th edition game rules, including character creation, combat and adventuring, classes and races, equipment and magic items, skills, feats, powers, and more.
Publisher blurb:
The first of three core rulebooks for the 4th Edition Dungeons & Dragons Roleplaying Game.
The Player's Handbook presents the official Dungeons & Dragons Roleplaying Game rules as well as everything a player needs to create D&D characters worthy of song and legend: new character races, base classes, paragon paths, epic destinies, powers, more magic items, weapons, armor, and much more.