From the back of the box...
THE MYSTERIOUS ORIENT
This box contains everything AD&D game players and DMs need to establish an exciting Oriental Adventures campaign! Kara-Tur, world of Eastern mystery, is on the far side of the planet from the FORGOTTEN REALMS Campaign Setting, but the two cultures interact only if you want them to! This is the "official" campaign setting for the Oriental Adventures rulebook. Kara-Tur has everything you need: Two 96-page books describe the places, culture, politics, monsters, magic, people, religions, and more, plus advice on running a long-term Oriental Adventures campaign, bringing characters from other worlds into Kara-Tur, and dimensional travel from Kara-Tur to other worlds. And there are four full color, two-sided maps of this land of mighty warriors and powerful enchantments.