Book excerpt: "Drawing upon a wealth of research, Coombs compares HMOs throughout the nation with the one in Marshfield, which came as close as any HMO to realizing the ideal of early advocates. This book is a resource for specialists in the fields of health policy research and analysis, health care management, health law and politics, public health, and social and organizational history of medicine. It will also appeal to many readers who are disturbed by the current stae of America's health care system and are curious about its future."--BOOK JACKET.