Book excerpt: Web3 is a term which refers to the third generation of the World Wide Web; it is a decentralized internet architecture that uses blockchain technology, smart contracts, and other decentralized technologies to create a more secure and transparent internet.Concepts, Technologies, Challenges, and the Future of Web 3 is led by researchers with a valuable mix of industry and academic experience. The book delves into the concepts of decentralization, trustlessness, and interoperability and explores the challenges of Web3, including scalability, security, and regulatory compliance. It examines the current and potential future use cases of Web3, such as decentralized finance, supply chain management, identity verification, and decentralized social networks. “The core building blocks of Web3” is not just for researchers, academics, and students in computer science and related fields but also for developers, entrepreneurs, and businesses looking to build applications and services in the Web3 space. It offers a clear understanding of the technical and conceptual frameworks underpinning Web3 and the challenges and opportunities in the decentralized web. Moreover, the book is valuable for policymakers, regulators, and legal professionals interested in understanding the regulatory frameworks and legal implications of Web3. It provides insights into the potential impact of Web3 on governance, regulation, and law, highlighting the need for new policy frameworks to address the challenges and opportunities presented by the decentralized web.