Four years have been passed away since the first edition of this book has been published. While certain key issues on IS sourcing like determinants and application service provision have become more mature from an academic and industry perspective, additional topics have arisen on the horizon. In particular, offshoring and business process outsourcing have led to numerous insightful publications which offer a valuable and indispensable holistic sourcing persp- tive. Thus, the second edition of our outsourcing book deals with enduring themes, new perspectives, and global challenges. In addition to classical themes like Sourcing Determinants (Part I), Relationship Aspects (Part II), and Experiences (Part III), we felt it worthwhile to add three new parts. They cover information systems outsourcing from a Vendor and Individual Perspective (Part IV), Application Service Providing (Part V) as well as Offshoring and Global Outsoucing (Part VI). Again we have thoughtfully tried to arrange a compilation of contemporary outsourcing research as a primer and a platform for scientific discourse. In contrast to the first edition, this book is not the outcome of an International Conference, but rather an update of important and relevant perspectives. Since the Third International Conference on Outsourcing of Information Services will take place 2007 in Heidelberg, Germany, it may be considered as an epilogue for further interactions and discussions.