I think I read this book too soon after Seriously... I'm Kidding. Tina Fey writes a good autobiography, and its actually the story of her life... but I wanted it to be funnier. Granted, Ellen's book is not her autobiography, so she can just choose to write about funny things.
Tina Fey is pretty darn inspiring. She stuck with her guns and did what she wanted to do, and it really good and it.
The "rules of improv" are really facinating! Seriously, if you follow these you will be an awesome actor. ok, maybe not. But you'll be better. And read this article! It talks about the connection between improv (show business) and your career.
Final word: Read this book.