On the field or off, it takes all you've got to be a winner.

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 for the NFL is a long shot.

Then Harrison's luck seems to change. He 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. In no time, he's practically unstoppable.

But Harrison's good luck can't last forever.

In his most dramatic and hard-hitting story yet, former NFL defensive end Tim Green writes about what it takes to be a winner, even when it seems like fate has dealt an impossible hand. Inspired by interviews with real-life cancer survivors and insider sports experience, this unforgettable story shows a brave boy who learns what it truly means to be unstoppable.