Der Diamant des Bösen

From Author Wars - https://authorwars.com/books/der-diamant-des-bosen-2551766.html

Overview:

Title: Der Diamant des Bösen
Author: Hans Wolf Sommer
Year: 1976
Type: Short Fiction
Series: Roger Conway
Number in Series: 2

Variant Titles:

1976. Der Diamant des Bösen