Have Dean Koontz and Bernhard Schlink both written at least one novel?
Bernhard Schlink Bernhard Schlink (born 6 July 1944 in Bielefeld) is a German lawyer and writer. His novel "The Reader", first published in 1995, became an international bestseller.
Friedrich Schlotterbeck Albert Friedrich Schlotterbeck (January 9, 1909 – April 7, 1979) was a German author who wrote prose fiction, plays, and radio plays, and was a local leader of the German Resistance during World War II.