"It certainly is a mystery how those autos disappeared," said Frank Hardy. "I'll say it is," replied his brother Joe, raising his voice to be heard above the cl

When the Hardy Boys eagerly agree to assist their friend Jack Dodd and his father in locating a family treasure, the two young detectives are unaware of the baf

The Hardy Boys series, first published in 1927, has sold more than 70 million copies! Now with a brand-new look, this is an edition that collectors won't want t

An offer to help a friend pits the Hardys against a ruthless gang of criminals.

The Hardy boys agree to help a friend and his father find a family treasure. When the friends disappear, the sleuths find themselves faced with two mysteries.