I Beat the Odds by Michael Oher (2011)
Michael Oher, the football player made famous in the movie The Blind Side, writes about his life before, during, and after he met the Tuohy family (featured in the film). He wrote this book for two reasons: first, to separate fact from fiction (since movies often take liberties with the facts to make it more interesting); second, and more importantly, to shine a light on the plight and difficulties faced by over half a million children in foster care, as well as the countless others raised in poverty.
He repeatedly mentions his own determination and self-discipline which ultimately led to his success, in order to give hope and encouragement to other children in similar situations. He includes resources at the end of the book for people who want to help children in need. I found this book inspiring and eye-opening.
You might want to also look at the NPR article about the book “Beyond ‘The Blind Side,’ Michael Oher Rewrites His Own Story“