This introductory chapter justifies the timing and the importance of this book. It grounds the motivation for both authoring and reading this book and presents the tangible benefits for the readers. It explains that it is useful for all purposes including a pocket guide that clarifies and explains the smart city domain. It can become a strong academic reference that defines and explains all the corresponding topics and concepts, while it contains revision questions that can be applied during tutoring. It offers managerial applications with the introduction and explanation of development frameworks, standards and real cases in practice. It also contains technological references, accompanied by government experiences. In general, someone who reads this book gains a full understanding of smart city together with a summary of the existing and the future trends of this topic.