I think this sums up the book
Don't misinterpret my rating. I gave it 3.5 stars based on entertainment value alone. To sum of the belief the author, in the past, aliens visited pre homo sapien man, bred with the women and came back later to check up on us and breed a bit more.
The author attempts to prove his theory that aliens visited ancient man by stating repeatedly that ancient man could not have accomplished many of the wondrous things they have been credited with or have obtained, without help, the knowledge they possessed. Clearly the author believed that ancient man was a stupid religious being.
I could rant on the stupid theories in the book but I will let you do it yourself. Regardless that many of the theories are nothing but wild postulation, the subject matter is interesting. I have always been intrigued about the possibility of alien life, so, crazy as this guy is, its a fun subject.
I read the book like a wild piece of fiction and was not disappointed.