From the back of the book:
Taking fantasy combat to the next level!
Introducing the legendary class, a new option for high-level characters who want to make a true impact on their world
A dozen new prestige classes, each with a unique organization and guidelines for integrating it with your campaign
More than a dozen new feats, including rage feats that make barbarians even more fierce in the frenzy of battle
Several alternate core classes that can be used to add flavor to characters from 1st to 20th level
Fully detailed rules for mounted combat and high-flying acrobatic combat
A new system of fighting schools that gives characters new options for building unique combat styles
More than a dozen new mounts as well as information on mount equipment and combat capabilities
A section devoted to describing fantastic locations and the effects of different terrains and environments on combat
New templates describing the benefits and drawbacks for characters who join an organization
New equipment and weapon modifications
A section on running tournaments and games that might be found at a local faire or royal competition, including rules for holding a joust
Requires the use of the Dungeons & Dragons Player's Handbook, Third Edition, published by Wizards of the Coast