It's a tough question, and I think depends a lot on what you're looking for. For the specific case of work ethic in the sense of committing deeply to projects

It's a tough question, and I think depends a lot on what you're looking for. For the specific case of work ethic in the sense of committing deeply to projects you believe in, then I'd point you towards "The Soul of a New Machine". But I'm sure others see it completely different.