This book collects the tutorial material developed by the authors during the six editions of the Master Classes and Courses on Modelling, Simulation and Analysis of Critical Infrastructures. These training events attracted more than 200 students from all over Europe and represented the cornerstone instrument for the training program developed inside the Critical Infrastructure Preparedness and Resilience Research Network (CIPRNet) project. CIPRNet is a Network of Excellence in the field of Critical Infrastructure Protection (CIP) composed of twelve outstanding institutions on the different topics involved in the CIP domain and co-funded by the European Union under the Seventh Framework Programme (FP7) for research, technological development and demonstration. CIPRNet moves from the fact that our societies are increasingly dependent on the correct functioning of a huge number of technological infrastructures. Several of these infrastructures are so relevant for our wellness that they are generically indicated as a Critical Infrastructure (CI). In the last two decades for political, technological, economical and societal reasons which includes the following: • unbundling power generation, transmission and distribution in the electrical power sector, • globalization of the markets, • diffusion of ICT and mobile telecommunication systems, • introduction of “smart” paradigms (e.g. smart grids and smart cities) and • increasing use of Internet.