We are on the brink of a new era in wireless communication. The advent of the next-generation wireless networks promises to revolutionize the way we connect, communicate, and interact with each other and the world. As we dive into this realm of advanced connectivity, one crucial aspect that needs attention is the network selection paradigm. The network selection paradigm refers to the process of choosing the optimal network from the available options based on certain criteria. With the proliferation of various wireless technologies such as 5G, Wi-Fi 6, and beyond, the need for an efficient and intelligent network selection mechanism becomes imperative. This book aims to shed light on the emerging network selection paradigm in next-generation wireless networks. It explores the challenges and opportunities that arise as we shift towards a more heterogeneous and diverse network environment. Through in-depth analysis and case studies, we delve into the complexities of network selection and propose novel solutions to enhance the overall user experience.