Robin Harris studied at Oxford University, won the Gibbs Prize, and obtained a DPhil in modern history. In the 1980s he served in various political and governmental capacities, including as a member of Margaret Thatcher's Number Ten Policy Unit, and in later years turned to free-lance journalism and to writing works of history and biography.
Among his books are Valois Guyenne: A Study of Politics, Government and Society in Late Medieval France (1994), Dubrovnik – A History (2003), The Conservatives – A History (2011), Not for Turning – The Life of Margaret Thatcher (2013), Stepinac – His Life and Times (2016). He now lives in Zagreb and is currently writing a history of modern Croatia.