Hostage to the Devil is one of the best books I have ever read. It is thoroughly engrossing, and his prose are impeccable. I must have read it four times in all.
I would also recommend ‘The Demonologist: The Extraordinary career of Ed and Lorraine Warren.’
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“The Conjuring” is coming our in July and is based on the Warrens.
http://www.youtube.com/watch?v=k10ETZ41q5o
I saw that trailer in theaters. I’m cautiously optimistic. :-)