Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Hardest book to put down out of the books I've read.

Even after reading the first three books, this book was the best book I've read. It had everyting from sci-fi to drama/ romance. I had to read it so much I finished it in 4 days. Even when there wasn't much happening it was still suspensful from the overwhelming amount of curiousity I had about what was going to happen- i.e. was Sandy or Dennys going to marry Yalith, or neither?