Required Reading: Design for the Real World
I just finished this book and now I want every designer, developer, tester, project manager, and especially QA/testers to read this.
This should be the required reading for any product team. If you've ever been in a company that said they were going to change the world or make a real difference, please let these ideas be your center. There is a lot of industrial design stuff but just squint your eyes and think about your fancy new iPhone.