Introduction; Towards a Science of Complex Systems: Bourgine, P.; Kepes, F.; Schoenauer, M.; Biological Modelling; Invariant Grids: Method of Complexity Reduction in Reaction Networks: Gorban, A.; Karlin, I.; Zinovyev, A.; Shape Spaces in Formal Interactions: Prandi, D.; Priami, C.; Quaglia, P.; Complex Qualitative Models in Biology: A New Approach: Veber, P.; Le Borgne, M.; Siegel, A.; Lagarrigue, S.; Radulescu, O.; Social Modelling; On the Dynamics of Communication and Cooperation in Artificial Societies: Eiben, A.E.; Schut, M.C.; Vink, N.; Towards a Functional Formalism for Modelling Complex Industrial Systems: Krob, D.; Bliudze, S.; A Theory-Based Dynamical Model of Innovation Processes: Lane, D.; Serra, R.; Villani, M.; Ansaloni, L.; Behaviour as a Complex Adaptive System: On the Role of Self-Organization in the Development of Individual and Collective Behaviour: Nolfi, S.; Optimization and Control of the Urban Spatial Dynamics: Semboloni, F.; Self-Organized Patterns in Production Networks: Weisbuch, G.; Author and Subject Index.