His complete catalogue as close as I can find. Studies of him would also be appropriate.
1932 An Outline of Zen Buddhism, The Golden Vista Press, 1932, 32 pages.
1936 The Spirit of Zen: A way of life, work and art in the Far East, paperback 1969.
1937 The Legacy of Asia and Western Man
1940 The Meaning of Happiness, paperback, 1970. ISBN 0-06-080178-6
1944 Theologica Mystica of St. Dionysius
1947 Behold the Spirit: A Study in the Necessity of Mystical Religion, Vintage, 1972
1950 Easter: Its Story and Meaning
1950 The Supreme Identity, Vintage, 1972.
1951 The Wisdom of Insecurity, Vintage, 1968.
1953 Myth and Ritual in Christianity, Beacon Press, 1971.
1957 The Way of Zen, Vintage Spiritual Classics, 1999.
1958 Nature, Man, and Woman, Vintage reissue, 1991.
1959 Beat Zen Square Zen and Zen,
1960 This Is It and Other Essays on Zen and Spiritual Experience, Vintage reprint, 1973.
1961 Psychotherapy East and West, Vintage ed. 1975,
1962 The Joyous Cosmology: Adventures in the Chemistry of Consciousness
1963 The Two Hands of God: The Myths of Polarity
1964 Beyond Theology: The Art of Godmanship, Vintage, 1973
1966 The Book: On the Taboo Against Knowing Who You Are, Vintage reissue, 1989
1967 Nonsense.
1970 Does It Matter?: Essays on Man's Relation to Materiality, Vintage ed. 1971.
1971 The Temple of Konarak: Erotic Spirituality (Thames and Hudson, London). Photographs by Eliot Elisofon; text by Alan Watts. Published as Erotic Spirituality: The Vision of Konarak by Macmillan, NY
1972 The Art of Contemplation: A Fascimile Manuscript with Doodles
1972 In My Own Way: An Autobiography 1915–1965, Vintage, 1973.
1973 Cloud-hidden, Whereabouts Unknown: A Mountain Journal, Vintage, 1974
Posthumous publications
1974 The Essence of Alan Watts, ed. Mary Jane Watts, Celestial Arts
1975 Tao: The Watercourse Way, with Al Chung-liang Huang, Pantheon
1976 Essential Alan Watts, ed. Mark Watts,
1978 Uncarved Block, Unbleached Silk: The Mystery of Life
1979 Om: Creative Meditations, ed. Mark Watts
1982 Play to Live, ed. Mark Watts
1983 Way of Liberation: Essays and Lectures on the Transformation of the Self, ed. Mark Watts
1985 Out of the Trap, ed. Mark Watts
1986 Diamond Web, ed. Mark Watts
1987 The Early Writings of Alan Watts, ed. John Snelling, Dennis T. Sibley, and Mark Watts
1990 The Modern Mystic: A New Collection of the Early Writings of Alan Watts, ed. John Snelling and Mark Watts
1994 Talking Zen, ed. Mark Watts
1995 Become What You Are, Shambhala, expanded ed. 2003.
1995 Buddhism: The Religion of No-Religion, ed. Mark Watts
1995 The Philosophies of Asia, ed. Mark Watts
1995 The Tao of Philosophy, ed. Mark Watts, edited transcripts, Tuttle Publishing, 1999.
1996 Myth and Religion, ed. Mark Watts
1997 Taoism: Way Beyond Seeking, ed. Mark Watts
1997 Zen and the Beat Way, ed. Mark Watts
1998 Culture of Counterculture, ed. Mark Watts
1999 Buddhism: The Religion of No-Religion, ed. Mark Watts, edited transcripts, Tuttle Publishing.
2000 What Is Zen?, ed. Mark Watts, New World Library.
2000 What Is Tao?, ed. Mark Watts, New World Library
2000 Still the Mind: An Introduction to Meditation, ed. Mark Watts, New World Library.
2000 Eastern Wisdom, ed. Mark Watts, MJF Books.
2002 Zen, the Supreme Experience: The Newly Discovered Scripts, ed. Mark Watts, Vega
2006 Eastern Wisdom, Modern Life: Collected Talks, 1960–1969, New World Library
