As someone who is currently starting his own business this book has been invaluable to my business partner and I.
The author is infectiously passionate about the possibilities of running a business ethically, without being preachy, and gives you loads of info about practical ways to do what you love (and make money) with a social and global conscience.
It breaks down the mind-boggling possibilities of beginning to think of your business in ethical terms - the case studies of other very successful ethical entrepreneurs are really useful: I'd never even heard of ethical PR. The idea that stays with you is the better your ethical business does, the bigger the positive impact it has on society