From the inside cover:
What is this book?
At the Jonstown * temple you can buy a written document. One day I send and I asked for "The cheapest list of Orlanth kings you've got." This book is a research document to discover what that list means.
"I heavily referenced the "Twelve Books" of Kulbrast the Bold in assembling this material and even found a rare copy of the "Durengard Scrolls" of Herelmel of Jadnor to include in this collection."