Inspired by interviews with real-life cancer survivors and insider sports experience, this unforgettable New York Times bestseller shows a brave boy who learns what it truly means to be unstoppable. As National Ambassador for Young People's Literature emeritus Jon Scieszka said, Unstoppable is "absolutely heroic, and something every guy should read."

If anyone understands the phrase "tough luck," it's Harrison. As a foster kid in a cruel home, he knows his dream of one day playing in the NFL is a longshot.

Then Harrison is brought into a new home with kind, loving parents—his 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.