Textbook in PDF format This book starts from a multi-energy coordination perspective to explore resilience enhancement strategies for integrated energy systems (IES) resilience by leveraging various emergency resources within the energy system. Its goal is to develop comprehensive disaster prevention and mitigation solution for IES, providing theoretical foundations and technical support for urban energy systems facing the growing challenge of extreme disasters. It includes power-gas-heat interdependency analysis, accelerated strategies for IES resilience evaluation, hierarchical fault scenario aggregating approach, IES resilient planning method with risk-economic coordination, network reconfiguration based recovery strategy, and hydrogen planning. This book is intended to provide researchers, engineers, and graduate students in the fields of electrical engineering and energy security with a unique understanding of energy system resilience