Macmillan Audio announced that Oprah Winfrey is in the studio narrating her upcoming audiobook, What I Know For Sure.

The book, a collection of the column of the same name Winfrey penned for O, The Oprah Magazine, will be published simultaneously with the hardcover on September 2. The hardcover is the launch title for Macmillan's Flatiron Books.

“We are thrilled that Oprah Winfrey will be reading her audiobook,” said Mary Beth Roche, president and publisher at Macmillan Audio. “Throughout her career, Oprah has created unparalleled connections with millions of people. Listeners to the audiobook will appreciate hearing the thoughtful insights shared in this book in Oprah’s own voice. It is sure to be one of the most powerful and sought after audiobooks of the year.”