The cover art for this novel baffles me. It made me think that the story was about a psychotic clown who murders children at birthday parties or something. I only bought the book because I'd previously enjoyed some of the author's other work. Having finally read it, I get why the clown is so significant, but I still have no idea why the publisher selected that particular character/image. To me, the cover is neither appealing nor a helpful indication of what kind of story you're getting. Sure, it's a bold, unconventional choice, but its bold and unconventional simply for the sake of being bold and unconventional. I can see people saying, "That's an interesting cover," but I can't imagine anyone saying, "I really like that cover."
However, there is one one respect in which the cover does feel appropriate: as a harbinger of the weird narrative style Piccirilli employs here--a style that is similarly bold and unconventional in an unappealing way. The man has a lot of talent; he just needs an editor to rein him in sometimes. A LOWER DEEP reminded me--in a really good way--of "occult detective" movies like CONSTANTINE and DR. STRANGE (but with a nastier, Clive Barker-type edge), yet it felt way too pretentious for what is essentially a pulp horror novel. It's also more than a tad sacrilegious--not that I expect Piccirilli fans to dock him points for that.
Despite my little rant, however, I'll readily admit that this is one wildly imaginative novel. Conceptually, I love it, though it let me down in terms of execution. On a final note, I'm glad I read the short story collection PENTACLE prior to this, since having a solid grounding in this mythos undoubtedly boosted my enjoyment.