The book "Critical Information Infrastructures" offers a comprehensive analysis of the resilience of critical information infrastructures in an increasingly digitalized world. It highlights the dependence of OECD countries on information and telecommunications systems, which have been vital for survival since the year 2000. The author discusses the changes brought about by globalization and the emergence of a multipolar digital world, and examines the challenges arising from the growing irrelevance of nation-states in a federated system. The book provides valuable insights into the necessity of protecting and strengthening critical infrastructures to ensure stability and security in a connected world.