During the summer vacations, the three friends are about to take a trip together to Romania, where they are allowed to complete an internship on...

A call for help from gallery owner Mr. Prentice leads the three detectives into a new adventure: his apartment is said to be haunted. When the...

"Solve the riddle of the Sphinx or someone will lose their life." - then the line goes dead. Justus, Peter and Bob are breathless. But the three...