The book "Decision Support Systems II - Recent Developments Applied to DSS Network Environments" offers a comprehensive collection of extended and revised versions of selected papers that emerged from two workshops of the Euro Working Group on Decision Support Systems (EWG-DSS). These workshops took place in 2012 in Liverpool, UK, and Vilnius, Lithuania. Out of a total of 33 submitted papers, 9 were selected for publication after being reviewed by at least three internationally recognized experts from the EWG-DSS program committee as well as external reviewers. The selected contributions reflect current research activities in the field of decision systems and address topics such as decision analysis for enterprise systems and non-hierarchical networks, integrated solutions for decision support and knowledge management in distributed environments, as well as the evaluation and analysis of decision systems through social networks. Additionally, the application of e-learning in real-world environments is discussed.