Instruct: Classify Amazon reviews into positive or negative sentiment
Query: HIS BEST BOOK YET!

I finished this book more than 12 hours ago and I still can't stop thinking about it. The plot was great and it will possibly be one of the best sci-fi books you'll ever read.The story mainly focuses on Cosmo Hill, but gives the point of veiw of other characters too just like Eoin Colfer does in many of his books. Once you start reading this book, you will not want to put it down. I know I didn't.I hope it becomes a classic for years to come.