Instruct: Classify Amazon reviews into positive or negative sentiment
Query: best book ever

This is my favorite book ever. The deep, tense plot, and the intriguing and multi-dimensional characters kept me reading non-stop from start to finish. Barney is good for all ages, especially the over-50 crowd. For those of you tired by the mindless action and violence, this is for you. This is unlike the TV show Teletubbies.