Absolutely not. He's not Von Daniken crazy, but potentially more insidious. He's extremely careful to caveat and disguise his crazy under a legitimate looking veneer. His books are extensively annotated and referenced, he talks like a legitimate archaeologist and makes sure that the more outlandish and conspiracy theory ideas are there by implication rather than overt claims. He works very hard to make it difficult to dismiss him out of hand and to keep a seat at the legitimate debate table.

However he does make sure that the more out there crazy does get referenced and carefully avoids saying anything, or referencing any counter-evidence that would discredit them. So he avoids being categorised with the more extreme crazies, while assiduously making it clear he is their friend. After all, he needs to sell his books.

Having said that, his stuff as with Von Daniken really is a lot of fun. I occasionally check it out just to keep current on state of the art crazy. Just bear in mind there's a lot of flim-flam in there and he will avoid referencing any evidence that debunks his claims, no matter how much of it there is. You will not get the whole story from him. For example he will write a book on a topic from the point of view of say 20 years before the book's development and publication, and ignore any inconvenient research later than that, and probably also ignore some relevant research and counter-arguments from before that as well.