Okay, I wrote a whole review for this, but it disappeared as I was trying to save it. I think that's ironic, given that it's probably the first time I've written such a negative review. Still, I will try to re-create it, though I've lost some of my original vehemence.
I'm going to be honest. I didn't actually finish this book. But unlike Archie Sheridan, I know when to stop doing something when it's making me feel bad. I started this book because I enjoyed the first one -- I liked the cast of characters, the setting, and, of course, the gruesome crimes. But most of all, I started this book because I wanted to see Archie overcome Gretchen and try to gain back his beautiful family, and at the end of Heartsick, it seemed like he was at least going to try. The sexual aspects of his relationship with Gretchen, only hinted at in the first book, were always the hardest parts for me to read. The extent to which Cain went in this book, as well as the revelation that they had an affair before he was kidnapped, actually made me furious. There is nothing compelling for me about these characters anymore -- not just Gretchen and Archie, but I only liked their relationship when it was subtle and nuanced. Archie, only half human to begin with, utterly lost my sympathy. I can't deny that there is something interesting about the aspects of human psychology that still drive him towards Gretchen, but I just stopped wanting to read about it. The motivations of so many of the characters never seemed more than two-dimensional, not least because Cain gives us so little background about them. But I could be wrong on that point since, again, I did not read the whole book. I just know that, for whatever reason, I identified most with Debbie right from the very start. And like her, I am so very done. But it's precisely because she's done that I have to be -- there's nothing fun about rooting for characters who have stopped giving you reason to root for them, or worse, who have stopped even rooting for themselves.