"He took a team that was at the very very bottom, and he brought them to the top." - Jack Dorsey
Keith Rabois recommended this book on a Medium blog post.
"Keep your lockers / desks clean and it'll reflect in other parts of your life." - Noah Kagan
"Words of wisdown from [the author] to inspire, inform, and enlighten leaders in all professions." - Ron Conway
"Even if you’ve never watched a down of football, you’ll get something out of this book." - Ryan Holiday
One of Sam Altman's answers to "What are some of the best books you recommend for a young startup founder?"
"Among the best books! A way of living, working & commitment to excellence." - Vinod Khosla