"Mastering Bitcoin" is a comprehensive guide to understanding and programming the Bitcoin blockchain. The third edition includes broad introductions for newcomers and technical explanations for developers. It covers Bitcoin's history, technical foundations, transactions, security, the Bitcoin network, and mining. The book also explains wallets and keys, providing practical guidance on compiling, configuring, and using Bitcoin Core. Furthermore, it examines advanced topics such as multisignatures, the Lightning Network, and alternative test networks for development. Finally, the book provides insights into Bitcoin security principles and strategies, emphasizing decentralization.