Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An adventure with mysterious twists and turns

The Boxcar children embark on another adventure only to run into trouble and then mystery atop a New England mountaintop. The mystery comes in the form of the whereabouts of a long-lost treasure that they learn about from an old Indian woman who says her grandfather hid it. The story takes a touching twist when the children meet a young Indian boy who also is looking for the treasure that he thinks belongs to him as the last member of the tribe to possess the secret goods. You'll be surprised by who eventually finds the treasure and what happens to each of the characters.