Conclusion: I'm far too squeamish to enjoy this book.
I thought I was okay with body horror. You know, I watched Hannibal -- even if I was peeking out through my fingers with my hands over my eyes for some of it. I can usually cope with gore a lot more than I can cope with violence; I think it's a pain thing. At least, that's always been the case with TV shows. But this? Well, pain wasn't a factor, and yet I was definitely not coping with the grossness.
Put simply, it's a zombie story, though of the scientific Frankenstein-style bent rather than a paranormal or magical interpretation. And we get Jolene, the reanimate corpse of a teenage girl, wandering around, slowly rotting throughout the book. Her skin flaps open. Her extremities fall off. Her fingernails just drop off abruptly. And it doesn't let up! Every moment there's some new horror. While I appreciate the dedication to really thinking about the whole 'undead' thing, I couldn't stomach it. I actually had to read this in small chunks, which isn't my usual style, because it got too much after a while to keep reading.
Maybe some readers would be okay with that, even find it entertaining, and therefore would be able to appreciate the characters and plot. There's certainly plenty going on, and some plot twists that I did my best to guess. (One of them, I thought I knew, then thought I was wrong, then turned out to be right, so nice double bluff there. The other, I was just proud of myself for figuring out.) There are some sweet relationships and emotional moments, and I really enjoyed Jo's loving relationship with her parents, because that's super rare in books, especially YA fiction.
BUT... this was gross. Stomach-churningly horrific in terms of body horror. I don't know what it was about it that I couldn't deal with compared to many other violent and disturbing things I've read, but apparently rotting corpses are a no-no for me. Good to know for the future, I guess, but it definitely inhibited my enjoyment of this in a major way. Not recommended for the squeamish and pathetic like me.