This edition of a landmark work of scholarship includes both a new preface by the author and a new foreword that places the book in its historical context. When insulin was discovered in the early 1920s, even jaded professionals marveled at how it brought starved, sometimes comatose patients with diabetes back to life. Defying the average timeline, the 1923 Nobel Prize in Physiology or Medicine was awarded for its discovery. To recount the fascinating story behind the discovery of insulin, in this classic work Michael Bliss draws on archival records and personal interviews with witnesses to the events. He unearths scientists' memoirs and confidential appraisals of insulin by members of the Nobel Committee, bringing science to life and resolving a longstanding controversy about scientific collaboration at its most fractious and fascinating: who among the Canadian team of Frederick Banting, Charles Best, James Collip, and John Macleod ultimately deserves credit for the discovery of insulin? Or is credit due farther afield--to Georg Zuelzer in Berlin, E.L. Scott in Chicago, Israel Kleiner in New York, Nicolas Paulescu in Bucharest, John Murlin in Rochester? Bliss's life-and-death saga illuminates one of the most important breakthroughs in the history of medicine. With a new preface by the author and a foreword by historian Alison Li, this enlarged edition celebrates the lasting impact of insulin's discovery and ongoing importance.