Helen Reilly (1891–1962) was a pioneering author of American Golden Age mysteries and considered to be one of the first women to write in the police procedural subgenre. She wrote over thirty novels starring Inspector Christopher McKee, of the fictitious Manhattan Homicide Squad. Most of her writing was published under her own name but she also published several novels under the pseudonym Kieran Abbey. A member of the Mystery Writers of America, she served as president of the organization in 1953.