"Play Their Hearts Out" is a non-fiction book by George Dohrmann, published in 2010. The book follows the lives of a group of young basketball players and their families who are involved in the Amateur Athletic Union (AAU) basketball system, which is a grassroots organization that helps young players develop their skills and advance to higher levels of competition. Through in-depth interviews and research, Dohrmann provides a behind-the-scenes look at the AAU system and the ways in which it can both help and exploit young players and their families. The book deals with themes of ambition, exploitation, and the pressures faced by young athletes and their families in the highly competitive world of amateur sports. It has been praised for its honest and eye-opening portrayal of the AAU system, and has become a seminal work on the topic of youth sports in America.