Back in 1996 Thomas J. Stanley and William D. Danko wrote The Millionaire Next Door, a nonfiction study of workaday millionaires--who turned out to be a bunch of skinflinty, old-car-driving, warehouse-shopping, small-business owners. The book was a best seller.
But as the years passed, Stanley (working on his own) noticed that he was getting a lot of letters from wealthy women who said the first Millionaire book didn't really apply to them. That made sense: 92% of the people who filled out the original survey were men. Thus a new project was born--a three-year study of wealthy women, published last...