Because if I belonged to a less liberally minded denomination, I suspect that even looking vaguely interestedly at, never mind buying, this book, would probably have me involved in some major church discipline thing, if not outright excommunication. ^_^
(Of course, the fact that, if the reviews are anything to go by, whether I'll have the stomach to actually read it may make having bought it rather moot. Still, as long as I can't actually see the gore I should be okay...)