The Dagger of Batu Khan
Original title: Der Dolch des Batu Khan
German title: Der Dolch des Batu Khan
Sebastian is disappointed. Work has once again priority for his father, a restorer in Dresden's historic "green treasure vault". Art treasures listed as missing since 1945 have been discovered in a bricked up cellar. Yet the expected dagger of Batu Khan is not among them. Sebastian and his friends find evidence on the internet that the dagger is to be stolen. So it must have been in the crate. The children investigate and reveal an international conspiracy.