Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Too Long and Ultimately Too Dark

Ultimately, I enjoyed this book a lot less than I thought I was going to. I enjoyed the details and the characterization, until the latter began to fall apart. People intended to be sympathetic just don't come across that way (I really kept wondering why everyone thought Ann was so wonderful, when she was consistently anything but - and to say I didn't get the appeal of the hero's old flame is putting it mildly), and the ending.... Well, it's difficult to say much without giving away spoilers, but the ending ruined the book for me in terms of enjoyment. It was clever in a technical sense, but not very believable when added to all the misdirection. Ultimately, I just don't like the kinds of mysteries where everyone ultimately rings false and everyone has dark secrets, especially when you are drawn into what you think is the decency of at least some of the characters.