Book excerpt: Service design is a rapidly growing area of interest in design and business management. There are a lot of books on how to get started, but this is the first book that describes what a "good" service is and how to design one. This book lays out the essential principles for building services that work well for users. Demystifying what we mean by a "good" and "bad" service and describing the common elements within all services that mean they either work for users or don't. A practical book for practitioners and non-practitioners alike interested in better service delivery, this book is the definitive new guide to designing services that work for users.