Title: The Gymnastics Mystery
Description: The Aldens try to help a visiting Russian gymnast who is surrounded by mysterious people and events and who seems to have a secret.
Subjects: Brothers and sisters, Orphans, Fiction, Gymnastics, Mystery and detective stories, Boxcar children (Fictitious characters), Juvenile fiction, Detective and mystery stories, Children's fiction, Gymnastics, fiction, Boxcar children (fictitious characters), fiction, Orphans, fiction, series:BoxcarChildren, collectionID:Boxcar3