Zen.

Not Always So: Practicing the True Spirit of Zen
by Shunryu Suzuki, Edward Espe Brown, Zen Center San Francisco
HarperOne; Published: 2003-06-01; Paperback; Book
Best price: $6.49
Price in other shops: $11.95

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Buddhism without Beliefs
by Stephen Batchelor
Riverhead Trade; Published: 1998-03-01; Paperback; Book
Best price: $6.44
Price in other shops: $13.00

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Zen.
by Charlotte Joko Beck
Droemer Knaur; Published: 2002-08-01; Hardcover; Book

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Finding Reality: Awakening to Spiritual Freedom
by Keith Loy
AuthorHouse; Published: 2008-03-09; Paperback; Book
Best price: $10.79
Price in other shops: $11.99

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The Book of One: The Spiritual Path of Advaita
by Dennis Waite
O Books; Published: 2004-02-25; Paperback; Book
Best price: $8.39
Price in other shops: $17.95

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The Laws of Spirit: A Tale of Transformation
by Dan Millman
HJ Kramer/New World Library; Published: 2001-09; Paperback; Book
Best price: $5.99
Price in other shops: $10.95

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No Ordinary Moments: A Peaceful Warrior's Guide to Daily Life (Millman, Dan)
by Dan Millman
HJ Kramer; Published: 1992-12-28; Paperback; Book
Best price: $6.94
Price in other shops: $12.95