If you've ever heard of a Ponzi scheme – and almost every American has – you will surely assume that Charles Ponzi, the man after whom the scam was named, was a bad man. He, like everyone else who ever started the scheme, cheated people out of their money. But a fascinating new biography of Charles Ponzi by Mitchell Zuckoff, "Ponzi's Scheme: The True Story of a Financial Legend," reveals that a few years before inventing his scheme, Ponzi had given a fair amount of his skin so it could be grafted onto a woman who he learned was dying...