Kinder/Jugendliche: Romane, Erzählungen, TatsachenberichteWiliam Arden ×Kosmos × The Three Investigators and the Mystery of the Laughing ShadowAmerican EnglishWiliam ArdenKosmos 2015 The Three Investigators and the Secret of the Crooked CatAmerican EnglishWiliam ArdenKosmos 2015