Instruct: Classify Amazon reviews into positive or negative sentiment
Query: well written story about a dead dog

This book was definitely not what I expected.I didn't know I was about to read Christopher's (a 15 year of boy with autism) story.That being said we follow Christopher on his adventure as he tries to figure out who killed the neighbors dog. The book is written from his point of view and seems very simplistic but helps greatly with character development. Although Christopher lacks basic "emotions", the book allows the reader to feel the emotions for him, and it works quite well. The book has many heartfelt moments and a few good twists.Christopher is very good at 'maths' and includes diagrams and mathematical examples throughout his book. Some of which are quite interesting.All in all an entertaining quick read.