New York Times bestselling author Tim Green has written an unforgettable storyinspired by interviews with real-life cancer survivors and insider sports experienceshowinga brave boy who learns what it truly means to be unstoppable."e;Absolutely heroic, and something every guy should read."e; (National Ambassador for Young People's Literature emeritus Jon Scieszka)If anyone understands the phrase "e;tough luck,"e; it's Harrison. As a foster kid in a cruel home, he knows his dream of one day playing in the NFL is a long shot.Then Harrison is brought into a new home with kind, loving parentshis new dad is even a football coach. Harrison's big build and his incredible determination quickly make him a star running back on the junior high school team.On the field, he's practically unstoppable. But Harrison's good luck can't last forever. When a routine sports injury leads to a devastating diagnosis, it will take every ounce of Harrison's determination not to give up for good.