Go in Action, Second Edition

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Go in Action, Second Edition has been substantially rewritten for modern Go, fully updated with the language, tooling, and development practices Go programmers use today.

• Completely updated for modern Go, with examples requiring Go 1.25 or later
• An entirely new chapter on generics, including type parameters, constraints, generic functions and data structures
• Error handling, including sentinel errors, custom error types, and error wrapping
• Testing workflows including unit testing, TDD, benchmarking, profiling, and Go’s built-in fuzz testing.
• Updated concurrency coverage built around a practical concurrent RSS reader
• Modern structured logging with log/slog alongside Go’s standard library
• Go modules and workspaces, replacing the GOPATH-era dependency-management material from the first edition and showing how to organize larger, multimodule Go projects
• New production-oriented architecture examples, including interfaces, dependency inversion, domain-driven design, and hexagonal architecture
• Two brand-new AI-focused appendices covering LLM-powered summarization and retrieval-augmented generation
• New and rewritten examples throughout designed around real applications

About the reader

Professional developers proficient in at least one object-oriented language who want to build high-performance backend systems, cloud native applications, or AI-integrated pipelines.

About the author

Joel Holmes is a software developer building cloud native applications at EasyPost. Andy Walker is a Google Developer Expert in Go and Gophercon staff member. A coauthor of the first edition of Go in Action, William Kennedy is a founding member of GoBridge.