J.K. Rowling, author of the Harry Potter book series, is still really, really rich, but she's no longer a member of the billionaires club.
While Rowling was one of the wealthiest women in the world in 2011 and mentioned on Forbes magazine's annual list of the world's billionaires, the British author was noticeably absent from this year's tally -- reportedly due to her sizable charitable donations (estimated to be in the neighborhood of $160 million!) and England's high taxation against its wealthiest citizens.
Carlos Slim Helu (and family), Bill Gates and Warren Buffett are Nos. 1, 2 and 3, respectively, in terms of overall net worth