Add Let's Go book

README.md

@@ -159,7 +159,7 @@ A developer's exprience in golang.
 Tested, easy-to-adapt code examples illuminate every step of Go development, helping you write highly scalable, concurrent software. You’ll master Go-specific idioms for working with strings, collections, arrays, error handling, goroutines, slices, maps, channels, numbers, dates, times, files, networking, web apps, the runtime, and more.
 
 ### [Go Design Patterns](https://www.packtpub.com/application-development/go-design-patterns)
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 <img src="https://www.packtpub.com/sites/default/files/B05557.png" width="120px"/>
 
 Learn idiomatic, efficient, clean, and extensible Go design and concurrency patterns by using TDD.
@@ -253,6 +253,12 @@ Whether you are planning a new application or working in an existing monolith, t
 
 A book filled with examples on how to use Docker and Go to create the ultimate 12 Factor applications. It goes over individual steps of [The Twelve-Factor App](12factor.net) guidelines and how to implement them with Go and Docker.
 
+### [Let's Go!](https://lets-go.alexedwards.net/)
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+<img src="https://lets-go.alexedwards.net/sample/assets/img/cover.png" width="120px"/>
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+Let's Go teaches you step-by-step how to create fast, secure and maintainable web applications using Go. It guides you through the start-to-finish build of a real-world application — covering topics like how to structure your code, manage dependencies, authenticate and authorize users, secure your server and test your application.
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 Resources
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