From the back of the book: Lurking behind these covers are over 150 of the most ferocious, wondrous, and challenging creatures of the D&D game. This new Creature Catalog revises and expands on the older product of a similar name, which it replaces. The perfect companion to the D&D Rules Cyclopedia, the Creature Catalog updates old monster descriptions, provides information compatible with the new Rules Cyclopedia, developes monster background information, and includes new creatures and old fiends from the very best D&D adventure modules. With the Creature Catalog, a DUNGEON MASTER can find the right monster to challenge any adventuring party, from 1st level on up. - Covers and illustrates over 150 creatures not included in the Rules Cyclopedia! - Contains and updated D&D creature index. - Features new wildernes encounter tables. Suitable for all levels of play