Critical Infrastructures: State of the Art in Research and Application, comprising a selection of reviewed and edited contributions from all over the world, aims to shed light on the various aspects of critical infrastructures. The editors of this book have opted for a broad view on the various criticality aspects on infrastructures itself as well as contributions that discuss the institutional and technical environment of critical infrastructures which are crucial for their proper functioning.Critical Infrastructures brings to light a number of eye-opening critical issues that have been only marginally touched upon in research and practice. Hence, the book is an indispensable resource for infrastructure policy makers, managers, consultants and researchers alike. The book is divided into four sections: *Vulnerability and Risk; *System Development and Adaptation; *Institutional Change; *Capacity Management.