Here is a list of books and articles that you might find useful. As well as texts referred to in this website, I’ve included other material that may be of interest.
Aitken, Robert. 1988. Gandhi, Dogen, and Deep Ecology, in The Path of Compassion: Writings on Socially Engaged Buddhism. 1988. Ed, Eppsteiner, Fred. Berkeley: Parallax Press.
Cooper, David,E. 2012. Convergence with Nature: A Daoist Perspective. Totnes,UK: Green Books.
Empiricus, Sextus. Trans R.G.Bury. 1990. Outlines of Pyrrhonism. New York: Prometheus Books.
Gunaratana, Bhante Henepola. 1992. Mindfulness in Plain English. Boston: Wisdom.
Gunaratana, Bhante Henepola. 2001. Eight Mindful Steps to Happiness: Walking the Buddha’s Path. Boston: Wisdom.
Hamill, Sam & Seaton, J.P. trans. & eds. 2007. The Poetry of Zen. London: Shambhala.
Hanh, Thich Nhat. 1995. Peace is every step: The path of mindfulness in everyday life. London: Rider.
Kennett, Jiyu. 1973. Selling Water by the River: A Manual of Zen Training. London: George Allen & Unwin.
Larson, Kay. 2012. Where the Heart Beats: John Cage, Zen Buddhism and the Inner Life of Artists. New York: Penguin.
McEvilley, Thomas. 2002. The Shape of Ancient Thought: Comparative Studies in Greek and Indian Philosophies. New York: Allworth Press/School of Visual Arts.
Mitchell, Stephen. ed. 1976. Dropping Ashes on the Buddha: The Teaching of Zen Master Seung Sahn. New York: Grove Press.
Needleman, Jacob. 1972. The New Religions. London: Penguin.
Pascal, Blaise. 2003. Pensées. New York: Dover.
Robinson, Marilynne. 2010. Absence of Mind. New Haven: Yale University Press.
Uchiyama, Kosho. 1974. Approach to Zen: The Reality of Zazen. Tokyo: Japan Publications.
Walker, Susan. ed. 1987. Speaking of Silence: Christians and Buddhists on the Contemplative Way. New Jersey: Paulist Press.