Instruct: Classify Amazon reviews into positive or negative sentiment
Query: I liked it because the mystery was interesting

This book is about a fifth grade class that suddenly starts disappearing and only one student knows it. That girl's name was Julia. She ran and told the principal's secretary. When she went to her class everyone was there. How peculiar! She was astonished. So it kept on happening.I think the author wanted to say that even if people aren't smart they can still help others to solve things.I liked it because the mystery was interesting and the characters are funny.