Go in Action, Second Edition (In Action)
by Joel Holmes, Andy Walker and William Kennedy
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BookPal × TalezoGo in Action, Second Edition (In Action)
"Generics, real error handling, actual project structure, the stuff I had to go learn the hard way elsewhere is finally just in the book now."—Mario Carrion, Paramount
Go in Action, Second Edition is the definitive guide to mastering Go’s unique type system and high-performance concurrency model. Coauthored by industry veterans Joel Holmes, Andrew Walker, and Go legend William Kennedy, this fully revised new edition reflects modern Go practices, replacing legacy environments with Go Modules and multi-module workspaces. You’ll find full coverage of Go Generics, native fuzz testing, and structured JSON processing, along with the architectural principles you’ll need to build AI-powered and agentic applications.
Written for working developers, this insightful book explains the “why” behind Go’s design decisions and shows you how those choices make it easier to write clean, safe code for highly concurrent software. It guides you through the creation of production-grade applications, including using Domain-Driven Design (DDD) and Hexagonal Architecture to build scalable, decoupled systems. Reviewer Rene G. Perrin of the Chicago Mercantile Exchange notes the “…excellent real-world examples of non-trivial tasks,” including a CLI conversion utility and a background RSS worker, that illustrate how to write software that behaves predictably under heavy workloads.
Go in Action, Second Edition also addresses the massive shifts in the software landscape caused by AI and agentic applications. You will learn how to design architectural boundaries using the Ports and Adapters pattern so that volatile LLM models and APIs can act as swappable adapters. These architectural decoupling techniques also ensure your core business logic remains completely unchanged, whether you are targeting a massive commercial LLM or a local model.
Two comprehensive appendices walk you through a full AI engineering exercise, where you build a high-performance vector search database with Qdrant, generate semantic embeddings, and implement an LLM-powered summarization pipeline using Ollama and LangChain for Go. Reviewer Hyeonggeun Oh of Amazon Web Services comments that the book’s “focus on modern patterns and AI integration directly mirrors the evolving demands of the industry.”
Go in Action, Second Edition meets you exactly at the intersection of modern application development and the established patterns and engineering practices that still govern reliable enterprise systems. The result is a comprehensive guide that helps you integrate Go into your daily workflow—from idiomatic code to orchestrating advanced, distributed systems.
- 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.
Table of Contents
1 Go is the solution
2 Diving into Go
3 Primitive types and operators
4 Collection types
5 Working with types
6 Generics
7 Errors in Go
8 Testing and tooling
9 Concurrency
10 The standard library
11 Working with larger projects
A Vector search with storage
B LLM-powered summarization
Details
- Publisher
- Manning
- Authors
- Joel Holmes, Andy Walker, William Kennedy
- Format
- Paperback
- Published
- Sep 29, 2026
- ISBN-13
- 9781633439702
- ISBN-10
- 1633439704
- Pages
- 384
Go in Action, Second Edition (In Action) for groups: pricing
Volume pricing applies automatically in your cart. No codes, no account needed.
| Copies | Price per copy | You save |
|---|---|---|
| 25 – 99 | $50.99 | 15% off list |
| 100 – 249 | $50.39 | 16% off list |
| 250 – 499 | $49.79 | 17% off list |
| 500 – 999 | $49.19 | 18% off list |
| 1,000+ | $47.99 | 20% off list |
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