Well, it's not that he takes the Bible literally... if you read the whole horrible thing, he takes PHRASES literally (according to his interpretation.) In a lot of spots his "evidence for Satan" is overthrown if you read the whole book or the whole chapter (in one spot he twists reference to a real ruler and says "it's just a metaphor for Satan" although I believe there's evidence that it was a real ruler.
Nor does he examine the underlying root words in the original language.
I've read it is also incomplete (according to sources it was supposed to be twice that long (and apparently he says so), although I don't think another 100 pages would have improved it.
-- Byrd
Moderator, Hall of Ma'at