Aside form being a pretty great read, the “Design Professionalism” book by Andy Rutledge is superbly designed. It’s a treat to read this on the web too.
Largely helping to guide you to this main statement “I want a successful, happy, and fulfilling design career.” it’s like the Bushido of our profession. Please everyone read this.
It’s also designed to be responsive on different device screens so go for it, you can read it on your iPhone on the way in to work or waiting for your lunch.