Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An excellent book

An amazing story and very well-written. This book will take you through Van Gogh's life, inform you about this amazing but troubled artist, and leave you with your mouth open. Good for all ages and types of people. The only tough thing about the book is that it is sort of a slow journey... you might find yourself wandering a bit in the early chapters, but it is immensely satisfying if you can forge through them and take an amazing ride through this guy's life (don't skip any chapters).