Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unforgettable

I couldn't put this book down. I knew what the end would be and it still made me cry when I got there. The novel is gripping, funny, and wrenching all at the same time. It is extremely well-written and the device of using letters to tell the story is innovative. You feel like Olivia is writing these letters to you. I can't say enough nice things about this book. It really is one of the best things I've read lately. I lost a beloved cousin to diabetes last year. She was like a sister to me and her struggle against her disease reminded me so much of what Maddie goes through in her struggle with Leukemia. At times it was just painful to read sections of this book because I identified so intensely with the characters and what they were going through. Elisabeth Robinson has obviously spent some serious time in hospitals and knows what it's like to deal with doctors who are less than caring and the frustration of not being able to do more for someone you love.