Semantic Web Services A paradigm shift is taking place in computer science: one generation ago we learned to abstract from hardware to software now we are abstracting from software to serviceware implemented through service oriented computing. Yet ensuring interoperability in open heterogeneous and dynamically changing environments such as the Internet remains a major challenge for actual machine to machine integration. Usually significant problems in aligning data processes and protocols appear as soon as a specific piece of functionality is used within a different application context. The Semantic Web Services (SWS) approach is about describing services with metadata on the basis of domain ontologies as a means to enable their automatic location execution combination and use. Fensel and his coauthors provide a comprehensive overview of SWS in line with actual industrial practice. They introduce the main sociotechnological components that ground the SWS vision (like Web Science Service Science and service oriented architectures) and several approaches that realize it e.g. the Web Service Modeling Framework OWL S and RESTful services. The real world relevance is emphasized through a series of case studies from large scale RD projects and a business oriented proposition from the SWS technology provider Seekda. Each chapter of the book is structured according to a predefined template covering both theoretical and practical aspects and including walk through examples and hands on exercises. Additional learning material is available on the book website www.swsbook.org. With its additional features the book is ideally suited as the basis for courses or self study in this field and it may also serve as a reference for researchers looking for a state of the art overview of formalisms methods tools and applications related to SWS. Dieter Fensel holds a professorship at the University of Innsbruck and is the director of STI Innsbruck a Computer Science research institute with over 60 employees. He has over 240 publications in the form of scientific books and journals conferences and workshop contributions. He has co organized over 200 conferences and workshops. He has supervised over 40 master and Ph.D. theses and is a recipient of the Carl Adam Petri Award of the Faculty of Economic Sciences from the University of Karlsruhe. His current research interests focus on the development and application of semantics to all areas of Computer Science. Dieter Fensel is also the co founder and president of the newly established Semantic Technology Institute (STI) International whose major aim is to establish semantics as a core pillar of modern Computer Science. STI International was the natural progression of DERI International where Dieter Fensel established expedient relationships with major research centers around Europe Asia and America. Federico Michele Facca was graduated from the Politecnico di Milano Italy and is currently a senior researcher at STI Innsbruck where he covers also the position of Institute Manager. His research interests cover Semantic Web Engineering Semantic Web Services Adaptive Web Applications Data Intensive Web Applications and Web Usage Mining. Elena Simperl is currently working as a senior researcher at the STI Innsbruck. Starting from May 2007 she was appointed to the position of vice director of the institute. Elena holds a PhD in Computer Science from the Free University of Berlin and had held positions as a research assistant at the Technical University of Munich (2002 2003) and the Free University of Berlin (2003 2007) before joining STI Innsbruck early 2007.Elenas primary domain of research is Knowledge Engineering. In particular she is interested in user and business oriented aspects of ontology building and management and in methods and paradigms for facilitating and encouraging knowledge sharing and reuse.