The German author of Mystery is a novelist. So is the author of The Playmaker.
Thomas Michael Keneally, AO (born 7 October 1935) is a prolific Australian novelist, playwright, and essayist. 
Peter Francis Straub (born March 2, 1943) is an American novelist and poet. 
The Playmaker is a novel based in Australia written by the Australian author Thomas Keneally. 
Mystery is a 1990 novel by American author Peter Straub, and is the second installment in Straub's loosely connected "Blue Rose Trilogy". 
