The DNA double helix, penicillin, the X-ray, insulinthese are routinely cited as some of the most important medical discoveries of the twentieth century. And yet, the 1949 discovery of lithium as a cure for bipolar disorder is perhaps one of the most importantyet largely unsungbreakthroughs of the modern era. InThe remarkable untold story of a miracle drug, the forgotten pioneer who discovered it, and the fight to bring lithium to the masses.