Fooled by Randomness by Nassim Taleb. Changed my life and my perspective on doing business, building company and understanding luck. Such a classic.
Also honourable mention: Super Pumped by Mike Isaac. Great read on the legendary Travis' journey.
This is my favorite of all his works. I feel like you can derive a lot of his other work if you payed attention in undergraduate probability theory and took Fooled by Randomness to heart.