From the back cover:
MONSTROUS FOES FOR EVERY HERO
Within the pages of this core rulebook for the 4th edition Dungeons & Dragons® Roleplaying Game lurk nearly 500 fearsome and deadly monsters for your heroes to face, each one specially designed for ease of use and excitement in play.
The Monster Manual® features long-time favorites such as giants, demons, and devils, as well as the brand-new titans, angels, and elemental archons. The book includes threats for characters of every level, from the lowly kobold minion to mighty Orcus, Prince of Undead!
Publisher blurb:
The third of three core rulebooks for the 4th Edition Dungeons & Dragons Roleplaying Game.
The Monster Manual presents more than 300 official Dungeons & Dragons Roleplaying Game monsters for all levels of play, from aboleth to zombie. Each monster is illustrated and comes with complete game statistics and tips for the Dungeon Master on how best to use the monster in D&D encounters.