Oprah's Unauthorized Bio Coming In April

People may tell all to OPRAH, but now KITTY KELLEY will tell all about Oprah.  Kelley's unauthorized 544-page book about the talk show queen, called Oprah: A Biography, will hit stores April 13th.  Kelley, whose previous works on FRANK SINATRA, NANCY REAGAN and the BUSH family painted them in a negative light, spent three years on the Oprah project and says she was left, quote, "full of admiration for her accomplishments and fascinated by her complexity."  Kelley reportedly interviewed more than 850 people for the book -- although Oprah wasn't one of them.