Book 4

Htchck Mys Grn Ghst-Pa

by Robert Arthur and Alfred Hitchcock

Published 12 September 1979

Book 5

The three investigators take on two mysteries: the disappearance of an ancient jeweled Japanese belt from a museum exhibit and the strange antics of a group of gnomes around an elderly woman's house.

Book 5


Book 10

Myst of Moaning Cave

by William Arden

Published 12 September 1985
While vacationing on a California ranch, three boys decide to investigate strange wails that come from a mysterious cave where a famous outlaw disappeared.

Book 11


Book 13


Book 22


Book 23


Book 25


Book 25


Book 25

Htchk Mys Dancng Devil

by William Arden and Alfred Hitchcock

Published 12 September 1976

Book 26


Book 32