banner image
THE HARDY BOYS ONLINE: An unofficial online resource for fans of the Hardy Boys books

Book details

The Masked Monkey

Volume #51 in the Hardy Boys Canon (1-58) series

  • Publication date: 1972
  • Ghostwriter: Vincent Buranelli
  • Summary: The search for the son of a wealthy industrialist takes the boys to Brazil and helps them to bring an identity fraud gang to justice.

Cover art (click thumbnail to enlarge)