Lewis and fellow novelist J. R. R. Tolkien were close friends. Both authors served on the English faculty at Oxford University, and both were active in the informal Oxford literary group known as the "Inklings". According to his memoir Surprised by Joy, Lewis had been baptized in the Church of Ireland (part of the Anglican Communion) at birth, but fell away from his faith during his adolescence. Owing to the influence of Tolkien and other friends, at the age of 32 Lewis returned to the Anglican Communion, becoming "a very ordinary layman of the Church of England".[1] His faith had a profound effect on his work, and his wartime radio broadcasts on the subject of Christianity brought him wide acclaim.