Hardy boys mystery stories

The Hardy boys dial a wrong number, get the Pentagon, and suddenly find themselves in a dangerous adventure involving national security.

Frank and Joe received a peregrine falcon valued at.

Frank and Joe suspect that there is something sinister going on at the site of an Alaskan waterfall when they and their friends are harassed and warned to stay away.

Frank and Joe, the Hardy boys, solve a mystery involving a magician, American secret agents, an international spy ring, and a Scottish castle.

Frank and Joe investigate a walled estate guarded by savage dogs, where a businessman is hiding in fear of his life.

The search for a stolen boat leads the Hardy brothers to Mexico where they become involved with a band of Indians and a strange smuggling operation.