from the back of the book:
The world around Khazan comes to life in this work. From before the ancient days of the Wizard Wars, through the epic of the wizards Khazan and Khara Khang, and through the rise and rule of Lerotra'hh, the beloved and dreaded Death Goddess, this tale has it all. This is the history of Ken St. Andre's Trollworld, including his take on a few of the kindreds that populated his Tunnels and Trolls™ campaigns for over thirty years.
Come share in the tale, even find a place for your own adventure in the continuing saga of Trollworld.
This book is an annotated timeline for the Trollworld setting. It expands on the "Trollworld Chronology" from the back of the T&T v7.5 rulebook.