What's your favorite book and why?

Ego is the enemy by Ryan Holiday. I can read this book every month and any time. Ego Is The Enemy starts off The type of people who tend to succeed early, tend to be the same kind of people who are in danger of ego taking the predominant voice in their actions.

My favourite is "With Winning in Mind" by Lanny Bassham, an Olympic gold medalist. It's all about mental management. A book worth reading and rereading in my opinion.