In 2003, Dr. Laura Nathanson was widowed after the misdiagnosis of her beloved husband. After this tragedy, she was determined to help others protect themselves and their loved ones from similarly preventable health care disasters--and help them benefit from health care miracles.

In What You Don't Know Can Kill You, Dr. Nathanson provides a guide to getting the best medical care and navigating our frustrating and often impenetrable health care system. In clear, non-medical language, she shows how to:

• Flag any signs of misdiagnosis and misleading analysis of...