Lieutenant-Colonel Claude Cunningham Bruce Marshall, known as Bruce Marshall (24 June 1899 – 18 June 1987) was a prolific Scottish writer who wrote fiction and non-fiction books on a wide range of topics and genres. His first book, A Thief in the Night came out in 1918, possibly self-published. His last, An Account of Capers was published posthumously in 1988, a span of 70 years.