From the release:
Welcome to Kos Island, the third volume of the highly-anticipated Swords of Kos Fantasy Campaign Setting! It follows Kos City and Lands Beyond Kos and is fully compatible with and expands upon concepts that appear in them.
This book contains detailed descriptions of the island of Kos, what lies around it, of its 12 major towns and villages, and of 10 specific places located on the island or smaller islets in the waters surrounding it. All of these elements can be used either individually or in conjunction with one another, and within the context of the Kos campaign setting or as part of any other campaign setting a storyteller might be using for their own games or stories. It also includes a fully-keyed map of the region, both in the book and as a separate 11 x 17 file that can be printed out on a single sheet of paper.