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Dixon, Franklin W.

The hypersonic secret / Franklin W. Dixon - 151 pages ; 19 cm - Hardy Boys mystery stories ; #135 . - Hardy Boys mystery stories ; #135. .

"A Minstrel book."

Joe and Frank investigate the disappearance of their friend's father when the plane he was flying disappears over the Adirondack Mountains.

Primary

ISBN: 0671505181

Subjects--Topical Terms:
Mystery and detective stories
Detective and mystery fiction
Detective and mystery stories
Mystery fiction
Hardy Boys (Fictitious characters)--Fiction

Dewey Class. No.: Fic.