I am a huge fan of Timothy Good.  Besides of being a good writer he is an excellent investigator for many years.  This book has a sub title of,” The Evidence for Extraterrestrial colonization of Earth.”  In this book if you complete this book, as I could not put it down, I am sure you will want to complete it in one night , might be the  final answer to this enigma. I can not say it better then the back of the book so I will quote from it. BUT...I want to tell you if you have any interest in UFOS, do not miss this one. IT is a must for anyone who has an interest in the enigma we call, FLYING SAUCERS! 

There are few books that carry the whole phenomena in so many ways. This book is not one that is must reading. This book is one that compels you to read it one night. But that even I can not do. Just in the index there are 12 pages of references to subjects and people in the book. There are no subjects left unturned in this amazing book of .Timothy Good.