The Boxcar children investigate the disappearance of a student's research paper from an observatory, and the subsequent disappearance of another student BRAND NEW, The Outer Space Mystery, Gertrude Chandler Warner, At an astronomy conference, the Aldens meet Mark who has made an important discovery. Navigate; Linked Data; Dashboard; Tools / Extras; Stats; Share . QSOGHZLAAPCI » eBook » The Outer Space Mystery Get Kindle THE OUTER SPACE MYSTERY Read PDF The Outer Space Mystery Authored by Gertrude Chandler Warner OUTER SPACE MYSTERY book. Book Condition: new. Paperback / so