On a tour for her memoir, “Matriarch,” Tina Knowles has wisdom to share from her childhood, her own motherhood journey raising Beyoncé and Solange, and her cancer diagnosis.

Tina Knowles, the mother of Beyoncé and Solange, has revealed her shock diagnosis of breast cancer in her new memoir, Matriarch.

Tina Knowles launched her book tour in Washington, D.C., and it was a moving night filled with touching moments.

On a book tour for her new memoir, “Matriarch,” an Oprah’s Book Club selection, she talked to me at CNN’s offices in New York ... Child, Beyonce’s singing group with Kelly Rowland ...

Play the USA TODAY ... on the book becoming a No. 1 New York Times bestseller. And there was a sweet surprise with Winfrey, Beyoncé, Solange and Kelly Rowland all sending their virtual support ...

On a book tour for her new memoir, “Matriarch,” an Oprah’s Book Club selection, she talked to me at CNN’s offices in New York ... Child, Beyonce’s singing group with Kelly Rowland ...

She flew back to New York on July 8 for the biopsies ... Beyoncé, Solange and Kelly Rowland (Knowles considers the former Destiny’s Child member an honorary daughter) rallied round Knowles ...

Rocker Bartees Strange, a special screening of 'Network,' 'Ximena Sarañina and a 'Star Wars' food drive are also recommended.