Since 1996, Oprah’s Book Club has included meticulously selected books—each chosen by the media mogul herself—that often become bestsellers. Now, in partnership with Apple, Oprah’s Book Club is experiencing a new chapter. Her most recent pick is Caste by Isabel Wilkerson, a history of the caste system in the US, which Oprah called the most “essential” Book Club pick yet. Look back at all 91 selections in this slideshow.