Book excerpt: Winner of the 2009 ACHE James A. Hamilton Book of the Year Award! "This book is a tour de force, and no one but John Nance could have written it. Only he could have made sophisticated, scientifically disciplined instruction about the nature and roots of safety into a page-turner. Medical care has a ton yet to learn from the decades of progress that have brought aviation to unprecedented levels of safety, and, in instructing us all about those lessons, John Nance is not just a bridge-builder he is the bridge." --Donald M. Berwick, MD, MPP, President and CEO, Institute for Healthcare Improvement (IHI)