Being a Librarian, I totally trust Kusche anyway, but, having read his book several times, and, having read his book about Flight 19.
He checked the facts, and the stories fell apart.
If you can get hold of it, the NOVA program on TBT was great.
They went to some of the big names (Berliz, Warner) and let them shoot themselves in the foot. They got Warner to admit he lied in his books to make better stories. Then they showed conclusively that statistically that there just wasn’t anything going on.