Tina Knowles' new memoir "Matriarch" is out now, and she is sharing more details about her life, including a battle with breast cancer.

Oprah Winfrey’s new book club pick is a memoir by an old friend and personal hero, Tina Knowles. Winfrey announced Tuesday that she had selected Knowles’ “Matriarch,” which was published this week.

Tina Knowles, mother of Beyoncé and Solange Knowles, is opening up about a recent health issue. The author of a brand-new book, "Matriarch: A Memoir," Tina Knowles spoke with People about her recent breast cancer diagnosis and subsequent recovery in an interview published Tuesday.