TAKE THE PLUNGE INTO:

The infinite depths of the Abyss.
The wild passions of Arborea.
The immeasurable randomness of Limbo.
The howling madness of Pandemonium.
The glorious battlefield of Ysgard.
INSIDE YOU'LL FIND:

The Book of Chaos, a 128-page guide for the Dungeon Master to the places, creatures, and special conditions of the five Chaos planes.

The Travelogue, a 48-page player's guide to these planes, profusely illustrated with full-color maps and illustrations.
Chaos Adventures, a 32-page adventure book containing 3 adventure outlines for each plane - 15 adventures in all!

Monstrous Supplement, a 32-page booklet detailing 15 new monsters, including new tanar'ri, in inhabitants of Yggdrasil, and the ever-changing creatures of Limbo.

Five fully detailed, poster-size maps of the realms of Chaos.

DIVE IN2 DIS:HARMONY Upheaval TUMU:LT
formlessness CONFUS:ION BEDLAM
ANARCHY CHAOS!

(It's Chaos, berk, and it don't have to make sense!)