Biographer Kitty Kelley has revealed that she is currently working on a book about US chat show host Oprah Winfrey.
In the past Kelley has courted controversy with books on the Bush family and Frank Sinatra and is hoping to make waves with Oprah.
The unauthorized book is already underway and interviews are taking place.
According to Digital Spy, Kelley said: "Oprah Winfrey has fascinated me for many years,"
"As a woman, she has wielded an unprecedented amount of influence over the American culture and psyche.
"She has built an empire around her personality and has been one of America's most admired business women and philanthropists. Oprah's story is one of hope, promise and realization of the American dream."
The book will be published by the Crown Publishing Group; no release date has yet been announced.
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