Frank Heller

Frank Heller was the pen name of a Swedish writer. His real name was Gunnar Serner. He lived from July 20, 1886 - October 14, 1947. He wrote a series of light novels. His books were about suspicious international business. Heller created the character Philip Collin in most popular books. Collin who was a detective and a thief. Collin also used the name Professor Pelotard.
Bibliography.
F. W. Murnau made a film called "The Grand Duke's Finances" (German: "Die Finanzen des Großherzogs") that was based on of Heller's novel with the same name.