Zen and the Art of Housekeeping: The path to finding meaning in your cleaning is a 2008 book by Lauren Cassel Brownell, ISBN: 13: 978-1-59869-449-9 or 10: 1-59869-449-9. Each chapter has a number, a name, a Zen concept and a cleaning koan. For example, chapter three is "Blue Monday: Learning to Love Laundry" for which the concept is "factors of enlightenment -- investigation, tranquility and mindfulness" and the koan is "what is the color of clean?"