Purdom was a devoted follower of the Indian silent teacher Meher Baba after meeting him in Devon, England on Baba's first visit to the West in 1931.[4] Purdom was Meher Baba's original biographer, writing The Perfect Master: The Early Life of Meher Baba in 1937, which covers Meher Baba's life from 1911–1936, and The God Man: The Life, Journeys & Work of Meher Baba with an Interpretation of His Silence & Spiritual Teaching in 1964. He also wrote an early single-volume edition of Meher Baba's discourses titled God to Man and Man to God: The Discourses of Meher Baba (1955) and with author Malcolm Schloss co-wrote a detailed account of a group visit with Meher Baba in India titled Three Incredible Weeks with Meher Baba.