Book 20

Myst Monstr MT-Htck-Pa

by M.V. Carey and Alfred Hitchcock

Published 12 September 1979
The three young sleuths solve a case of double identity while investigating the legend of Monster Mountain.

Book 21


Book 21

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

Book 22


Book 23


Book 23

Hitchck Myst Invis Dog

by M.V. Carey

Published 12 August 1975
The Three Investigators are hounded by supernatural forces as they attempt to recover a stolen sculpture of a legendary wolf-dog.

Book 23

Htck Mys Invsbl Dog-Pa

by M.V. Carey and Alfred Hitchcock

Published 12 February 1981
The Three investigators are hounded by supernatural forces as they attempt to recover a stolen sculpture of a legendary wolf-dog.

Book 24

Hchck Mys Dth Trap Mine

by M.V. Carey and Alfred Hitchcock

Published 12 September 1976
The Three Investigators, aided by their friend Allie, try to untangle the unusual circumstances surrounding an abandoned mine.

Book 24


Book 25


Book 25


Book 25

Htchck Mys Dancng Devl

by William Arden and Alfred Hitchcock

Published 12 September 1976
The Three Investigators search for a stolen statue only to find that it has mysteriously come to life.

Book 25


Book 25

Htchk Mys Dancng Devil

by William Arden and Alfred Hitchcock

Published 12 September 1976

Book 26


Book 26

When three junior detectives search for a valuable old Spanish sword lost since the Mexican War, the headless statue of a horse yields a clue.

Book 26


Book 27

Mystery of the Magic Circle

by M.V. Carey

Published 16 July 1981
Three young sleuths uncover a coven of witches when they search for the missing memoirs of a movie star.

Book 27

Myst Magic Cir-Htck-Pa

by M.V. Carey and Alfred Hitchcock

Published 12 February 1981
Three young sleuths uncover a coven of witches when they search for the missing memoirs of a movie star.

Book 28