This is the book I was waiting for. Before this book I spent hundreds of hours researching business rules on the internet and still didn't get the detailed material that this book contains. I agree with other reviewers that you can use this book to base a business rules implementation on, and you can also use it to teach business rules to your team. I think it has a perfect balance of implementation, concept and practical information and recommend it to anyone who is interested in business rules. I skimmed through the Morgan book that others have recommended and like it too, but it is basic and will not help you in implementation. This (von Halle) book is the one to get and it's the most complete book on the subject available.