Daniel Keyes ( August 9 , 1927 -- June 15 , 2014 ) was an American author best known for his Hugo award-winning short story and Nebula award-winning novel `` Flowers for Algernon '' .
Daniel Keyes ( August 9 , 1927 - June 15 , 2014 ) was an American author . He was well known for his Hugo award-winning short story and Nebula award-winning novel `` Flowers for Algernon '' .