This book, part of the European Society of Intensive Care Medicine (ESICM) textbook series, deals with dysregulated host response a relatively new term introduced by the Sepsis-3 definitions in 2016. In contrast to systemic inflammatory response syndrome (SIRS) that has been used for nearly 30 years, this is a fundamentally new concept, which requires some sort of a paradigm shift in the way of thinking of critical care physicians. This change obviously requires time and after 5 years, time is ripe to summarize the knowledge in the form of a comprehensive book.The book is split in 4...