Kara Goucher grew up with Olympic dreams. She excelled at running from a young age and was offered a Nike sponsorship deal when she graduated from college. Then in 2004, she was invited to join a secretive, lavishly funded new team, dubbed the Nike Oregon Project. Coached by distance running legend Alberto Salazar, it seemed like the opportunity of a lifetime. Kara was soon winning a World Championship medal, going to the Olympics, and standing on the podium at the New York and Boston marathons, just like her coach. But behind the scenes, Salazar was hiding dark secrets.

When Des woke up on April 16, 2018, the morning of the Boston Marathon, it was 39 degrees and raining, with high, gusty winds. The weather didn’t bother her. In fact, she thought it might be a blessing. She was far from peak form—recovering from illness and questioning her running future—and didn’t expect much of herself that day. But as she ticked off mile after mile in the brutal conditions, passing familiar landmarks on the course she knew and loved, something shifted. Opportunity unexpectedly presented itself. Des tapped into her inner strength and found a reason to race.

Lauren Fleshman has grown up in the world of running. One of the most decorated collegiate athletes of all time and a national champion as a pro, she was a major face of women’s running for Nike before leaving to shake up the industry with feminist running brand Oiselle and now coaches elite young female runners. Every step of the way, she has seen the way that our sports systems—originally designed by men, for men and boys—fail young women and girls as much as empower them. Written with heart and verve, Good for a Girl is a joyful love letter to the running life.

Over the last fifty years, women have made extraordinary advances in athletics. More women than ever are playing sports and staying active longer. Whether they’re elite athletes looking for an edge or enthusiastic amateurs, women deserve a culture of sports that helps them thrive: training programs and equipment designed to work with their bodies, as well as guidelines for nutrition and injury prevention that are based in science and tailored to their lived experience. Yet too often the guidance women receive is based on research that fails to consider their experiences or their bodies.

Deena Kastor was a star youth runner with tremendous promise, yet her career almost ended after college, when her competitive method - run as hard as possible, for fear of losing - fostered a frustration and negativity and brought her to the brink of burnout. On the verge of quitting, she took a chance and moved to the high altitudes of Alamosa, Colorado, where legendary coach Joe Vigil had started the first professional distance-running team. There she encountered the idea that would transform her running career: the notion that changing her thinking - shaping her mind to be more encouraging, kind, and resilient - could make her faster than she’d ever imagined possible.