A rich, unmined piece of Canadian history, an intense psychological drama, a mystery to be solved . . . and a hardwon escape from a family curse. Like his friends Banting and Best, Dr. John FitzGerald was a Canadian hero. He founded Connaught Labs, saved untold lives with his vaccines and transformed the idea of public health in Canada and the world. What so darkened his reputation that his memory has been all but erased? A sensitive,...