Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Endure a Night Without Sleep

I spent an entire night (darkness to bluish-pale-just-before) finishing Enduring Love and felt somehow disappointed at the end, reading the appendix, some kind of psychological crime report that reiterated the entire novel without the science and evolution and letters. I was highly engrossed, though, and the book was, as someone else said, refreshingly challenging (McEwan, the person said, doesn't underestimate the reader). Resent I felt when I read Clarissa's letter...I thought he developed her character not as fully as he could have and without much perspective, the narrator's voice was sometimes a little pompous. A generous character makes a better narrator, but I suppose Joe Rose was supposed to be hopelessly involved in himself and his stalker. I blame him, too!