Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Chilling Mystery

On each page, there is a new train, with a different group of animals riding in it. Four dogs, five penguins, etc. On the last page, there is a ten-car train with ten different animals...except that there are two alligators. Looking back over the book so far, the careful reader will find that one animal appearing in the previous pages did not make it to the final train. What has happened here? Did one of the alligators really....(PS. My one-year-old daughter likes the book a lot. So far we have shielded her from the grim truth.)