Publication:Hollow World

This box set contains a 128 Dungeon Master's Sourcebook, 64 page Player's Book and a 32 page Adventure Book. There are also four fold-out poster maps.

The Dungeon Master's Sourcebook gives information on the history, locations, immortals, and campaigns on The Hollow World.

Hollow-World is a sub-setting for Mystara, the default campaign setting in the Basic Rules edition.