Frank Heller was the pen name of the Swedish writer Gunnar Serner (1886-1947) who wrote light novels about shady international business transactions. His best known works include Philip Collin, who was simultaneously a detective and a thief. Library Review called The Emperor's Old Clothes: "A mystery story of unusual quality, it describes with striking reality a series of extraordinary events, and is pervaded with a whimsical humor that make it genuinely refreshing.