Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Not worth buying

The first book was thrilling and a feel-good story about a rather lucky orphan. The second book was a nice sequel to the first, where Molly takes another trip to Hollywood and gains a new power. But by the third book, it gets old. The orphan we knew and loved is now replaced by some superhero-type person. I would suggest only reading the first and second book, and then assume that Molly Moon lives happily ever after with her parents.