Unterricht und Didaktik: Moderne SprachenRobert Arthur ×eBooks × The Three Investigators and the Mystery of the Vanishing TreasureAmerican EnglishRobert ArthurKosmos 2015 The Three Investigators and the Mystery of the Stuttering ParrotAmerican EnglishRobert ArthurKosmos 2015 The Three Investigators and the Secret of Terror CastleAmerican EnglishRobert ArthurKosmos 2015 The Three Investigators and The Mystery of the Whispering MummyAmerican EnglishRobert ArthurKosmos 2015 The Three Investigators and the Mystery of the Fiery EyeAmerican EnglishRobert ArthurKosmos 2015 The Three Investigators and the Mystery of the Screaming ClockAmerican EnglishRobert ArthurKosmos 2015 The Three Investigators and the Mystery of the Talking SkullAmerican EnglishRobert ArthurKosmos 2015