When insulin was discovered in the early 1920s, even jaded professionals marveled at how it brought starved, sometimes comatose diabetics back to life. In this now-classic study, Michael Bliss unearths a wealth of material, ranging from scientists' unpublished memoirs to the confidential appraisals of insulin by members of the Nobel Committee. He also resolves a longstanding controversy dating to the awarding of the Nobel to F. G. Banting and J. J. R. Macleod for their work on insulin: because each insisted on sharing the credit with an additional associate, medical opinion was intensely divided over the allotment of credit for the discovery. Bliss also offers a wealth of new detail on such subjects as the treatment of diabetes before insulin and the life-and-death struggle to manufacture it.