. . . "1938"^^ . . . . . . "Book"@en . . . . "__WIKIA_BANNER__ The Secret Warning is the 17th book in The Hardy Boys series. It was first published in 1938 by Grosset & Dunlap."@en . . . . . "The Secret Warning"@en . "220"^^ . . "__WIKIA_BANNER__ The Secret Warning is the 17th book in The Hardy Boys series. It was first published in 1938 by Grosset & Dunlap."@en . "The Secret Warning (original text)"@en . . . . .