For this young boy, the arrival of his little sister feels like the end of the world, she leaves a trail of chaos throughout the entire house. Frustrated, he eventually finds himself wondering: what are girls good for? This book offers him all the answers through an embedded documentary featuring 4 strong female figures. Readers will discover the mini biographies of Miriam Makeba (South African singer), Gisèle Rabesahala (political figure), Alice Milliat (founder of the Women's Olympics), and Katherine Johnson (American space engineer).