Also included is a comprehensive index of all D&D monsters found in the Basic, Expert, Companion and Master rulesets.

This includes six sections: Animals (along with giant and extinct creatures), Conjurations (such as elementals and golems), Humanoids, Lowlife (such as insects, plants, and jellies and slimes), Monsters (a miscellaneous category), and Undead.

A variety of authors and artists combined to the listings including Zeb Cook and Gary Gygax.

AC9 Creature Catalogue was compiled by Graeme Morris, Phil Gallagher, and Jim Bambra, and was published by TSR in 1986.

[4] He stated that "this accessory is a worthy product offering a solid selection of creatures for use in any Dungeons and Dragons campaign".