Article · Wikipedia archive · Last revised Aug 2, 2026

The Masked Monkey

The Masked Monkey is the fifty-first volume in the original The Hardy Boys series of mystery books for children and teens published by Grosset & Dunlap.

Last revised
Aug 2, 2026
Read time
≈ 1 min
Length
205 w
Citations
2
Source
The Masked Monkey
AuthorFranklin W. Dixon
LanguageEnglish
SeriesThe Hardy Boys
GenreDetective, mystery
PublisherGrosset & Dunlap
Publication date19721
Publication placeUnited States
Media typePrint (hardback & paperback)
Pages178 pp
Preceded byDanger on Vampire Trail 
Followed byThe Shattered Helmet 

The Masked Monkey is the fifty-first volume in the original The Hardy Boys series of mystery books for children and teens published by Grosset & Dunlap.

This book was written for the Stratemeyer Syndicate by Vincent Buranelli in 1972.2

Plot summary

The Hardy brothers' search for the missing son of a wealthy industrialist leads them to Brazil and great danger. Chet's hobby at the time is retrieving golf balls from the bottom of ponds at the golf courses around the Bayport area. This yields important clues that help the Hardys round up a gang of criminals who help other criminals change their identity.

Characters include Joe Hardy, Frank Hardy, Fenton Hardy, Laura Hardy, Aunt Gertrude, Chester Morton, J.G Retson, Phil, Tony, Joachim San Marten, Gus McCormick, Mr Jackson, Mrs Martha Jackson, Harris, Harry Grimsel, Sam Radley, Belkin, and Moreno.

The story takes place in Granite City, Bayport, New York, Belém, and Manaus.

References

References