From publisher blurb:
The Kingdom of Karak is a Fifth Edition conversion of our Labyrinth Lord offering Adventures in Karak. Within you'll find information about the world of Cairnvarthi, the history of Mithgarthr, races common on Mithgarthr, the gods who originated and are venerated on Mithgarthr, a new race of hirelings for characters, the magic that creatures in the service of Chaos wield, a new race of monster, major towns and cities in the kingdom of Karak, an introductory adventure, and more!
Meant for GMs who prefer the bones of a campaign setting with which to hang the meat of their own adventures and creations, The Kingdom of Karak gives enough information about the setting to give a good feel for it, without stifling the creativity of the GM.