Mystery in the Cave (Boxcar Children Series)

Plot

One warm night four children stood in front of a bakery. No one knew them. No one knew where they had come from. Henry, Jessie, Violet, and Benny used to live alone in a boxcar. Now they have a home with their grandfather, and they're fixing up their boxcar so they can ride it in the big Greenfield Founder's Day parade. There's just one problem. Someone has stolen the boxcar with their dog, Watch, in it! If they can only find the missing boxcar, it will lead them to Watch. Can the Boxcar Children solve their most important mystery ever? - Back cover.