From the introduction: Thennla is explored in two sourcebooks: Shores of Korantia and The Taskan Empire, each providing more detail on two of the great empires of the world. This sourcebook extracts information from these supplements to give prospective players and Games Masters an introduction to Thennla before delving into greater details. It concentrates on the continent of Taygus, home to the Taskan and Korantine cultures.