Today, Macmillan Audio announced that Oprah Winfrey will narrate the audiobook for her forthcoming book What I Know For Sure.

What I Know For Sure, due out Sept. 2, is a collection of columns Winfrey has written in O, The Oprah Magazine, and shares its name with Winfrey’s column. This is the first time that her columns have been revised updated and collected. For the past 14 years, Winfrey has written one column each month and has used the experience as an opportunity to “take stock of her life.” She was inspired to write the column after film critic Gene Siskel posed her the question, “What do you know for sure?”

In the press release, Mary Beth Roche, President and Publisher at Macmillan Audio, said, “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.”