Build reliable systems software with Zig through a project-driven approach focused on practical engineering challenges. Guided by UNIX systems engineer & bestselling author Mihalis Tsoukalos, you will learn modern systems programming techniques while creating production-ready applications, UNIX tools, & network services. This book takes you from essential UNIX tooling and build infrastructure to advanced topics such as direct memory access, binary formats, filesystem monitoring, networking, concurrency, asynchronous I/O, & database integration. Through hands-on projects, you will create command-line utilities, TCP and UDP services, HTTP applications, file indexing tools, cache servers, & a domain-specific language interpreter that combines memory management, comptime metaprogramming, parsing, evaluation, & error handling. Each chapter demonstrates how Zig features solve practical systems programming problems. You will work with memory management, process control, synchronization primitives, event-driven architectures, SQLite integration, protocol design, & performance-focused data structures while learning the reasoning behind key engineering decisions. By the end of this book, you will be able to build efficient and maintainable systems software in Zig & confidently apply the language to production projects.