Kitty's got claws, and she likes to scratch. The first lady of unauthorized biography is back. Kitty Kelley has a new book in the works, and her target this time out is none other than Oprah Winfrey.

For those of you unfamiliar with Kelley, her methods are best described as tabloid. She's published unflattering biographies on the Bush family, the British royals, Nancy Reagan and Frank Sinatra. She unearthed the coke-snorting habits of George W., Jackie O's battle with depression and Nancy Reagan's supposed affair with Sinatra.