I wasn't impressed by these books on the devil through history, of which I read three. From memory the first may have had most to it. But I found them undeep, I hesitate to say shallow. I felt I'd learnt very little at the end of three books, aside from detail. I didn't find deep thought on evil, although he tries. I remember he quotes from Dostoyevsky, and I remember it was a surface use of the quotes, that only contrasted him to Dostoyevsky to me. There's nothing here like that great's treatment of evil or his hallucinated devil in The Brothers Karamazov. I must gotten rid of them as empty, I can't find them now.