Books with title Alfred Hitchcock and the Three Investigators in

HC, 1968, ex library, cover shows wear and rubbing along edges, corners, and spine, tape reinforces the hinges inside both front and back cover, smudges on fore edge, clean inside, tight binding.

None

Preteen age level

Bob, Peter and Jupiter help a young English boy find a legendary ruby that his uncle willed him

Three young sleuths discover who is haunting a mysterious old mirror--and why.

With a clue provided by an unusual stuffed cat, The Three Investigators solve the mysterious troubles of an accident-prone carnival.

Three junior detectives investigate a mystery involving an Oriental chest, a sunken ship, and a baffling dual identity.

Bob, Pete, and Jupiter try to solve the mystery of the green phantom and become involved with ruthless pearl smugglers

Three junior detectives travel abroad to solve a mystery involving a silver spider and a political plot that endangers the life of a young prince.

Because they are present when a mysterious man steals a prize at the carnival, the three investigators are launched on another adventure in which they use a clue provided by an unusual stuffed cat to investigate the mysterious troubles of an accident-prone carnival.

The three investigators try to solve a mystery involving a gold Indian amulet and a weird laughing shadow that appeared to them in the night.

While vacationing on a California ranch, three boys decide to investigate strange wails that come from a mysterious cave where a famous outlaw disappeared.