From the back of the book:
The HERO System is back -- and better than ever!
Widely regarded as the best roleplaying game system ever created, the HERO System returns to print with its new 5th Edition. Written by award-winning game designer Steven S. Long, the 5th Edition updates the classic HERO System rules, providing new options, clarifications, and information for Hero gamers everywhere.
Unlike any other roleplaying game, the HERO System provides you with unfettered flexibility, letting you exercise your own creativity without hindrance. Build any character, power, gadget, skill, weapon, ability, or vehicle you can think of! It's the ultimate gamer's toolkit, allowing you to do what you do best: create great characters and games.
Whatever you want to do, in any genre, time period, or setting, the HERO System lets you do it.
The 5th Edition includes:
The complete HERO System rules, rewritten and revised to address commonly-asked questions and improve clarity;
Hundreds of new options for Hero gamers, allowing them to better create and define characters, abilities, vehicles, and more;
Over 300 example powers, gadgets, abilities, weapons, and spells for all genres;
A detailed, comprehensive index.