Ralph Hammond Innes (15 July 1913 – 10 June 1998) was a British novelist who wrote over 30 novels, as well as children's and travel books. He was married to fellow author and actress Dorothy Mary Lang in 1937 who died before him, in 1989. He was awarded a C.B.E. (Commander, Order of the British Empire) in 1978. The World Mystery Convention honoured Innes with a Lifetime Achievement Award at the Bouchercon XXIV awards in Omaha, Nebraska, Oct, 1993.
Innes was born in Horsham, Sussex, and educated at the Cranbrook School in Kent. He left in 1931 to work as a journalist, initially with the Financial Times (at the time called the Financial News). The Doppelganger, his first novel, was published in 1937. In WWII he served in the Royal Artillery, eventually rising to the rank of Major. During the war, a number of his books were published, including Wreckers Must Breathe (1940), The Trojan Horse (1941) and Attack Alarm (1941); the last of which was based on his experiences as an anti-aircraft gunner during the Battle of Britain at RAF Kenley. After being demobilized in 1946, he worked full-time as a writer, achieving a number of early successes. His novels are notable for a fine attention to accurate detail in descriptions of places, such as in Air Bridge (1951), set partially at RAF Gatow, RAF Membury after its closure and RAF Wunstorf during the Berlin Airlift.
Innes went on to produce books in a regular sequence, with six months of travel and research followed by six months of writing. Many of his works featured events at sea. His output decreased in the 1960s, but was still substantial. He became interested in ecological themes. He continued writing until just before his death. His last novel was Delta Connection (1996).
Unusually for the thriller genre, Innes' protagonists were often not "heroes" in the typical sense, but ordinary men suddenly thrust into extreme situations by circumstance. Often, this involved being placed in a hostile environment (the Arctic, the open sea, deserts), or unwittingly becoming involved in a larger conflict or conspiracy. The protagonist generally is forced to rely on his own wits and making best use of limited resources, rather than the weapons and gadgetry commonly used by thriller writers.
Four of his early novels were made into films: Snowbound (1948) from The Lonely Skier (1947), Hell Below Zero (1954) from The White South (1949), Campbell's Kingdom (1957) from the book of the same name (1952), and The Wreck of the Mary Deare (1959) also from the book of the same name (1956). His 1973 novel Golden Soak was adapted into a six-part television series in 1979. It was partly filmed in Nullagine, Western Australia. An audio adaptation of The Doomed Oasis has been repeated on the UK digital radio station BBC Radio 7 (now called BBC Radio 4 Extra).
Innes' great love and experience of the sea, as an experienced yachtsman, was reflected in many of his novels. With his wife Dorothy they traveled and raced their yachts Triune of Troy and Mary Deare. At his death he left the bulk of his estate to the Association of Sea Training Organisations, to enable others to gain training and experience in sailing the element he loved.
- The Doppelganger (1937)
- Air Disaster (1937)
- Sabotage Broadcast (1938)
- All Roads Lead to Friday (1939)
- The Trojan Horse (1940)
- Wreckers Must Breathe (also published in the U.S. as Trapped) (1940)
- Attack Alarm (1941)
- Dead and Alive (1946)
- Killer Mine (1947)
- The Lonely Skier (also published in the U.S. as Fire in the Snow) (1947)
- The Blue Ice (1948)
- Maddon’s Rock (also published in the U.S. as Gale Warning) (1948)
- The White South (also published in the U.S. as The Survivors) (1949)
- The Angry Mountain (1950)
- Air Bridge (1951)
- Campbell’s Kingdom (1952)
- The Strange Land (also published in the U.S. as The Naked Land) (1954)
- The Wreck of the Mary Deare (1956)
- The Land God Gave to Cain (1958)
- The Doomed Oasis (1960)
- Atlantic Fury (1962)
- The Strode Venturer (1965)
- Levkas Man (1971)
- Golden Soak (1973)
- North Star (1975)
- The Big Footprints (1977)
- The Last Voyage: Captain Cook’s Lost Diary (fictionalised account of Captain Cook's third and last voyage) (1978)
- Solomons Seal (1980)
- The Black Tide (1982)
- High Stand (1985)
- Medusa (1988)
- Isvik (1991)
- Target Antarctica (1993)
- Delta Connection (1996)
Books for children (as Ralph Hammond) 
- Cocos Gold (1950)
- Isle of Strangers (1951)
- Saracen's Tower (1952)
- Black Gold on the Double Diamond (1953)
- Harvest of Journeys. Knopf. 1960. ISBN 9780006121800.
- Scandinavia (1963)
- Sea and Islands (1967)
- The Conquistadors. Collins. 1969. ISBN 9780002175319.
- Australia (1971)
- East Anglia (1986)