As with most books by non-academics (and I don’t mean to sound snobbish here) there are some overstatements. Some of the details aren’t so finely parsed. It’s the big picture the author’s after and he does quite well when it comes to the modern era. Not only is there enormously more material from which to choose, there is also a great deal of literature and even headlines available to harvest. All writers that I’ve encountered on the subject make the point of demonstrating that news of what’s happening in the modern world suggests either the Devil exists or that something (or things) is doing a great job parodying such a character. When seeing evil in the highest reaches of the government it’s not so hard to believe.
The thing about the Devil is that he almost died out. In the nineteenth century when the explanatory value of science was firmly kicking in, and industrialization was making our live both easier and harder, the dark lord went underground. Humans seemed capable of making and claiming their own evil, and even the professionals—the clergy and formal religionists—had admitted Satan was most likely a metaphor gone wild. The birth of Fundamentalism, a movement that became prominent only in the 1920s, necessarily resurrected the Devil. The Bible does mention Lucifer, so he had to be real. Since that day he’s learned a lot. Protean to the extreme, he bears many guises. No longer beholden to a demonic tail, cloven hooves, or a pointy beard, he most often appears clean shaven and wearing expensive business suits. Borrowing a phrase from the Good Book, it’s by his fruits that we know him. Stanford’s biography shows its age a little, but when you’re covering a couple thousand years of speculation, being outdated is only a venial sin.