Tony narrated the audio version which I listened to over my vacation to
I experienced this at two of the start ups where I worked. Everything is exciting. People work all hours of the day. You are with your friends all the time. But then slowly start ups hire outsiders who are just there for the money. The culture goes down hill to just a bunch of people there to do a job and get out.
Tony studied what makes people happy such as the following:
1. Have a higher purpose
2. Make progress all the time
3. Get into flow
Then Tony applied it to give Zappos' a higher purpose: to make their customer's happy. He implements the happiness theories thru out the entire company. He has made a science of getting his culture right. He has lots of practical ideas which every company would benefit from.
Reading this book will make you happy, I guarantee it!