What was the politician's position that was in the biography Percy Jackson wrote?
Percy Joske:  He was knighted in 1967, and died in 1981; a year before his death, he published a biography of Sir Robert Menzies. Robert Menzies: Sir Robert Gordon Menzies, {'1': ", '2': ", '3': ", '4': "} (20 December 189415 May 1978), was the Prime Minister of Australia from 1939 to 1941 and again from 1949 to 1966.
Prime Minister