
The Secret Adversary
by Agatha Christie (1922)
Like 'The Hardy Boys: The Tower Treasure', this features young protagonists solving mysteries with a sense of adventure.

by Franklin W. Dixon (1927)
After a dying criminal confesses that his loot has been stashed "in the tower", the Hardy boys make an astonishing discovery.,
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by Agatha Christie (1922)
Like 'The Hardy Boys: The Tower Treasure', this features young protagonists solving mysteries with a sense of adventure.

by Dashiell Hammett (1933)
Similar to 'The Hardy Boys: The Tower Treasure', this offers a classic mystery with engaging characters and sharp dialogue.

by Robin Stevens (2014)
Echoing 'The Hardy Boys: The Tower Treasure', this book provides a young-person's mystery with a strong sense of place and friendship.

by Mac Barnett (2009)
Like 'The Hardy Boys: The Tower Treasure', this offers a fun and engaging mystery with youthful protagonists navigating challenges.

by Rex Stout (1934)
This classic mystery, like 'The Hardy Boys: The Tower Treasure', features clever deduction and memorable characters solving a crime.
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