Diana Vreeland wasn't just a tastemaker; she created the whole idea of tastemaking. She was the oracle of style, a woman who defined the way we looked at couture. Across a career that spanned half a century, she edited Harper's Bazaar and Vogue, discovered Lauren Bacall (and innumerable others) and was style consultant to Jackie Onassis. But behind all the glamour and the glitz, who was the real Diana Vreeland?