Christopher Alexander Roger Helm (born Dundee, 1 February 1937 – 20 January 2007) was a Scottish book publisher, notably of ornithology related titles, including the Helm Identification Guides.Born in Dundee, he was raised in Forfar, where his father was a Presbyterian minister.The family moved to Tunbridge Wells at the start of World War II, and he was educated at Harrow School, then, after active duty in Cyprus with the Highland Light Infantry (as National Service), he graduated in classics and law from Gonville and Caius College, Cambridge in 1960.He was an active member of the council of the British Ornithologists' Union, becoming vice-president in 1995.He married twice: in 1967 to Caroline Price, they had two sons, Alexander (who died from cystic fibrosis) and Zebedee; their marriage was dissolved in 1976; and in 1979 to Amanda Thomas, with whom he had a daughter Annabel and another son, Tom.