The Outer Space Mystery
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15
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Average rating3
The Boxcar children investigate the disappearance of a student's research paper from an observatory and the subsequent disappearance of another student.
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92 primary books93 released booksThe Boxcar Children is a 93-book series with 92 primary works first released in 1924 with contributions by Gertrude Chandler Warner, Shannon Eric Denton, and 7 others.
