The Running Dream by Wendelin Van Draanen

Winner of the 2012 Schneider Family Book Award for Teen Books

Description from Goodreads: "Jessica thinks her life is over when she loses a leg in a car accident. She's not comforted by the news that she'll be able to walk with the help of a prosthetic leg. Who cares about walking when you live to run? As she struggles to cope with crutches and a first cyborg-like prosthetic, Jessica feels oddly both in the spotlight and invisible. People who don't know what to say, act like she's not there. Which she could handle better if she weren't now keenly aware that she'd done the same thing herself to a girl with CP named Rosa. With the support of family, friends, a coach, and her track teammates, Jessica may actually be able to run again. But that's not enough for her now. She doesn't just want to cross finish lines herself—she wants to take Rosa with her."

Check out this clip of Van Draanen talking about the inspiration for this book.