Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nancy goes to look into 1 thing and finds another.

This book is wonderful. It has two mysteries in one. It's one of the best I've read. It has a great plot, and it neatly draws it together at the end. It kept me in suspense and it was difficult to put away. And if you enjoy this one, I suggest you read Clue in the Diary ,too.