William Angus McIlvanney (25 November 1936 – 5 December 2015) was a Scottish novelist, short story writer, and poet. He was known as Gus by friends and acquaintances. McIlvanney was a champion of gritty yet poetic literature; his works Laidlaw, The Papers of Tony Veitch, and Walking Wounded are all known for their portrayal of Glasgow in the 1970s. He is regarded as "the father of Tartan Noir" and as Scotland's Camus.
McIlvanney was born in Kilmarnock on 25 November 1936, the youngest of four children of a former miner, and attended school at Kilmarnock Academy. He went on to study English at the University of Glasgow and graduated with an MA in 1960. McIlvanney then worked as an English teacher until 1975, when he left the position of assistant headmaster at Greenwood Academy to pursue his writing career. The writer's elder brother was the sports journalist Hugh McIlvanney. His son, Liam McIlvanney, is also an author of the crime genre.