John le Carré

David John Moore Cornwell, better known by his pen name John le Carré, was a British and Irish author, best known for his espionage novels, many of which were successfully adapted for film or television. "A sophisticated, morally ambiguous writer", he is considered one of the greatest novelists of the postwar era. During the 1950s and 1960s he worked for both the Security Service (MI5) and the Secret Intelligence Service (MI6).