ISBN-13: 9780807510094 / Angielski / Miękka / 1990 / 128 str.
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 traveling on a train--in their own caboose, Number 777. On the trip, they encounter a strange mystery surrounding the history of their caboose!