Michael McCullough is an American investor in healthcare and life science companies, social entrepreneur, and emergency room doctor. Wikipedia
Source: "Has a lot of principles in it for young people right out of college, or kind of in the middle of their twenties and such, to think about how to pursue their careers." - Michael McCullough
Source: Keith Rabois recommended this book on a Medium blog post.
Source: "[Also] helped me really be successful." - Ken Block
Source: "Put first things first." - Dustin Moskovitz