The only book that I have read that really struck home with me giving a possible explanation for UFOs was [...] The Cosmic Conspiracy by Stan Deyo. [...] Deyo, a Christian, is a genius who wrote the book way over my head. [...] He says that Satan has always used that mode of transportation to get around because the devil can only be at one place at one time [...] I do not know if it is true, but it is an interesting theory.