Left: 1 ed, 1971, Ola Ericson. Right: 10 ed, 1990, Ola Ericson.

Below: Left: 1 pr, 1982, Christina Nauckhoff. Right: 2 pr, 1983.

Author: William Arden

Translator: Lasse Mattsson

Swedish cover: Ola Ericson & Christina Nauckhoff.

First Swedish edition: 1971 (1968 in the USA)

Editions: 10 (Wahlströms). 2 printings (Hemmets Journal, Disney)

Spine-number (Wahlströms): 1570-71

Original title: The mystery of the Moaning Cave

Review:

The Three Investigators travel to a farm and they begin to investigate a moaning cave. Has the mystery something to do with the legend of the old bandit El Diablo, or is there another explanation? This is a very strong story by William Arden, his first book in the series. Thrilling and many odd figures.