Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather, and are spending the summer mountain climbing in New England. A dangerous rockslide, a mountain cave, and a secret treasure are a few of the adventures in store for the boxcar children!
- ISBN-13: 9780807552933
- ISBN-10: 0807552933
- Publisher: Albert Whitman & Company
- Publish Date: December 2019