FROM THE PUBLISHER (translated): Service Design represents functionality and the form of services from the customer perspective. Services are designed to be useful from the perspective of customers and desirable from the perspective of providers effectively, efficiently and differently.
Service designers create, visualize and formulate such new services. In that UTB is Birgit Mager, founder of the teaching area service design, the course content and applications before this young discipline.
Service Design 
Somewhat of an untraditional textbook as it focuses less on the how, but more the why (there is a methods-chapter similar to the one in Miettinen & Koivisto). It follows the structure of Birgit's earlier books: it introduces the service concept and highlights services role in the world economy and then showcases the need to design services.
My favourite part is that Birgit highlights various locations to study service design and good details on how to find service design on the web for those who haven't done it yet.
On a sidenote the typeset has to be mentioned--it is stated that typesetters often are ignored but that they wanted to change it. So the typesetter is co-author and has gone wild in the layout. Unfortunately a little to wild IMHO, as the book at times is very hard to read due to the typesetting.