Title: The Outer Space Mystery
Description: The Boxcar children investigate the disappearance of a student's research paper from an observatory and the subsequent disappearance of another student.
Subjects: Fiction, Brothers and sisters, Orphans, Mystery and detective stories, Children's fiction, Outer space, fiction, Boxcar children (fictitious characters), fiction, Brothers and sisters, fiction, Orphans, fiction, Grade 3.7., Detective and mystery stories, series:BoxcarChildren, collectionID:Boxcar3, Siblings, fiction