Alfred Hitchcock, die drei ??? [Fragezeichen] und der verschwundene Schatz

Die Drei ??? und der Verschwundene Schatz (German Edition) by Alfred Hitchcock and Robert Arthur. 1979 (6th edition/6.Auflage) hardcover published by Franckh'sche Verlagshandlung, Stuttgart. Text in German. Three young detectives become involved in mysteries related to the disappearance of an ancient Japanese jeweled belt from a museum exhibit and the strange antics of a group of gnomes around an elderly woman's house.