This book was beautiful, inspiring, and competitive all at the same time. It was about two best friends, Kate and Zoe, who happened to be Olympic bike racers. Kate had married a fellow Olympic bike racer, Tom. Zoe was the other best friend. Kate and Tom had a daughter, Sophie, who was actually biologically Zoe's. Sophie had cancer, causing Kate to miss out on 2 Olympics. This book challenged their friendships and family dynamic. It was beautiful to see their family grow together emotionally and overcome challenges.