Teenage detectives Frank and Joe Hardy investigate a supposedly haunted house reported to be the hangout of criminals.

An archaeological expedition in the West turns into a desperate attempt to capture robbers and an escaped convict.

In trying to trace a missing will, detectives Frank and Joe Hardy trap a dangerous criminal who is willing to risk all--including murder--for money.

Strange events involve Frank and Joe Hardy in a mystery which shrouds an ancient treasure?the golden head of the Pharaoh Rhamaton IV. The owner of the million-dollar golden Pharaoh?s head claims it was aboard the freighter Katawa, which sank not far from Whalebone Island. But suspicious developments indicate that Mehmet Zufar may be trying to defraud the shipping line?s insurance company. Frank and Joe enthusiastically accept the challenge of their...

Their SOS ignored in a storm, the Hardy boys find a wallet containing two thousand dollars alongside their boat and are launched into a mystery involving diverse clues.

The Hardy boys find the missing deed to an Indians' land, prevent a phony salesman from carrying through a reckless scheme, and help their father solve a top-secret case.