AC Grayling is a distinguished philosopher notable for his ability to make philosophy relevant to contemporary readers and audiences. He is Master of the New College of the Humanities, and a Supernumerary Fellow of St Anne's College, Oxford. He is associated with the new atheism movement and is sometimes described as the 'Fifth Horseman of New Atheism'. He has written and edited more than 30 books on philosophy and other subjects; among his most recent are The Challenge of Things, Liberty in the Age of Terror, The God Argument and To Set Prometheus Free.