John Creasey was born in Southfields, Surrey, to a working-class family. He was the seventh of nine children of Ruth and Joseph Creasey, a poor coach maker. Creasey was educated at Fulham Elementary School and Sloane School, both in London. From 1923 to 1935 he worked various clerical, factory, and sales jobs while trying to establish himself as a writer. After a number of rejections, Creasey's first book was published in 1930. His first crime novel, "Seven Times Seven", was published in January 1932 by Melrose. It was a story about a gang of criminals. In 1935 he became a full-time writer. In 1937 alone, twenty-nine of his books were published. A phenomenally fast writer, he once suggested that he could be shut up in a glass-box and write there a whole book.