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.

When the Hardy boys buy a Chinese junk for a money-making venture, they discover it has a serious flaw.

A banker who has been receiving threatening notes enlists the help of the Hardy boys. Before very long, the young sleuths find themselves entangled in the investigation of a notorious band of thieves.

Timber wolves, a Rocky Mountain blizzard, and a mine cave-in are only a few of the perils Frank and Joe Hardy encounter during their search for the principal members of a notorious gang responsible for a payroll robbery. In the old Montana mining camp of Lucky Lode, the young detectives puzzle over a series of mysterious events. A piano-playing ghost haunts the long-abandoned dance hall. Eerie blue lights flash from the hilltop cemetery in the dark...

An overview of fingerprinting, including definition, history, how to take fingerprints, how to identify pattern types, and how to compare fingerprints.

Frank and Joe attempt to foil a ruthless espionage ring in their effort to sabotage the United States space program.

As a final step in solving a mystery, Frank and Joe face the ghost at Skeleton Rock.