Harold Robert Daniels was born November 3, 1917, in Winchendon, Massachusetts. He graduated from college in Milford, Connecticut, and became a specialist in the metal industry. He was editor of Metalworking magazine from 1958 to 1972. In the 1950s Daniels began publishing short stories, and in 1955 he published his first novel, In His Blood, which was nominated that year for an Edgar for Best First Novel. John D. MacDonald praised his fourth novel, The Snatch, as "one of the modern classics of crime and punishment." Daniels' last novel and first hardback original, The House on Greenapple Road, was published by Random House in 1966. He died December 4, 1987, in Providence, Rhode Island.