'Martin Shaw' is actually three authors:
Martin Shaw (1) (b. 1947), professor of international relations and politics at the University of Sussex and author of Marxism and Social Science: The Roots of Social Knowledge.
Martin [Edward Fallas] Shaw (2) (1875-1958), English composer, author of National Anthems of the World, and, together with Pearcy Dearmer and Ralph Vaughan Williams, of the Oxford Book of Carols.
Martin Shaw (3) (b. 1945), English actor and narrator of an audio edition of J.R.R. Tolkien's Silmarillon.