The Hardy Boys: Secret Files is series of novels for young readers. It debutted on April 27, 2010, with the release of the first two books by Simon & Schuster's Aladdin Paperbacks imprint. The series is similar to The Hardy Boys are: The Clues Brothers, in that it is aimed at younger children unlike other Hardy Boys series, such as The Hardy Boys Undercover Brothers or The Hardy Boys Digests.