"Considered part of the Original series by some"@en . "Rudy Nappi"@en . "214"^^ . . . "ISBN 0-448-1990-6"@en . "__WIKIA_BANNER__ The Hardy Boys Detective Handbook is a guide book to methods for solving mysteries, and was the first ever Hardy Boys spin-off published. It was first published in 1959 by Grosset & Dunlap, and the revised edition was published 12 years later, in 1972."@en . . . . . "The Hardy Boys Detective Handbook"@en . "__WIKIA_BANNER__ The Hardy Boys Detective Handbook is a guide book to methods for solving mysteries, and was the first ever Hardy Boys spin-off published. It was first published in 1959 by Grosset & Dunlap, and the revised edition was published 12 years later, in 1972."@en . . "The Hardy Boys Detective Handbook (revised text)"@en . "1972"^^ . "Print"@en . "1987"^^ . . .