Lean Thinking: Banish Waste and Create Wealth in Your Corporation, by James Womack and Daniel Jones. ISBN 0-684-81035-2.
ecx.images-amazon.com
This is a book for the Extreme Programming reading list.
Here's a paper on Lean Thinking: www.poppendieck.com 
// link defunct 2012-05-08 22:56:38 CET
// Find it yourself: google.com
See original on c2.com