. . . . . "Hopping Mad"@en . . . . "Hopping Mad"@en . . . "__WIKIA_BANNER__ Hopping Mad is the fourth book in The Hardy Boys: Secret Files series. It was published in September 2010 by Aladdin Paperbacks."@en . "Paperback"@en . "2010-09-14"^^ . "__WIKIA_BANNER__ Hopping Mad is the fourth book in The Hardy Boys: Secret Files series. It was published in September 2010 by Aladdin Paperbacks."@en . "Mystery Map"@en . . . "A Monster of a Mystery"@en . . "The Hardy Boys: Secret Files"@en .