Evelyn Underhill (6 December 1875 15 June 1941) was an English Anglo-Catholic writer and pacifist known for her numerous works on religion and spiritual practice, in particular Christian mysticism.In the English-speaking world, she was one of the most widely read writers on such matters in the first half of the 20th century. No other book of its typeuntil the appearance in 1946 of Aldous Huxley&39;s The Perennial Philosophymet with success to match that of her best-known work, Mysticism, published in 1911.Underhill&39;s greatest book, Mysticism: A Study of the Nature and Development of Man&39;s Spiritual Consciousness, was published in 1911, and is distinguished by the very qualities which make it ill-suited as a straightforward textbook. The spirit of the book is romantic, engaged, and theoretical rather than historical or scientific.