John Mingers & Leslie P. Willcocks 
Social Theory and Philosophy for Information Systems [PDF ebook] 

As Information Systems (IS) matures as a discipline, there is increased consideration and analysis of alternative theories, methodologies, and philosophies. Collecting major social theorists and philosophers into one volume, this book provides a historical and critical analysis of each that is authoritiative. The result is an insightful text that provides an up-to-date starting point for those considering alternative approaches.