Franklin W Dixon

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

Joe and Frank investigate some pranks around Bayport, leading them to the Red Arrow, a crime grang.

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 baffling complications that will arise. The only clue to the long-lost treasure is a cryptic message written by a Pilgrim ancestor. But when Mr. Dodd and Jack are accused of stealing cars and then mysteriously disappear, Frank and Joe are confronted with a triple mystery. Have their friends run...

After the new hydrofoil they are guarding is stolen, the Hardy boys face frequent danger in solving a mystery involving criminals who operate by signs of the zodiac.

A blind peddler?s warning and a weird glass eye plunge Frank and Joe Hardy into one of the most baffling cases they have ever tackled. The young detectives? investigation takes them to a walled estate guarded by savage dogs, where a wealthy businessman is hiding out in fear for his life. In a climax that will hold the reader spellbound with suspense, Frank and Joe find themselves trapped in a sinister house of mystery where there seems to be no escape!...

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.