Steven Billy Mitchell (born 28 December 1959), usually known by the pseudonym and pen-name of Andy McNab, is a novelist and former Special Air Service soldier.
He came into public prominence in 1993 when he published a book entitled Bravo Two Zero containing an account of a military mission which he led with the Special Air Service (SAS) during the Gulf War, for which he was awarded the Distinguished Conduct Medal. He had previously been awarded the Military Medal in 1979 for gallantry in action whilst serving with the Royal Green Jackets in Northern Ireland.
He has published a number of other novels and two autobiographies in addition to Bravo Two Zero. He has also published a book on psychopathy entitled The Good Psychopath's Guide to Success, claiming that he exhibits many psychopathic traits.