The book mentioned below is basically the defacto book on TDD; but if you are in the .NET ecosystem (or know how to read C# pretty well) and want to read a nice

The book mentioned below is basically the defacto book on TDD; but if you are in the .NET ecosystem (or know how to read C# pretty well) and want to read a nice practical one I can really recommend The Art Of Unit Testing published by Manning: https://www.manning.com/books/the-art-of-unit-testing-second-edition https://www.manning.com/books/the-art-of-unit-testing-second... Also note that these days all popular commercial IDEs (Visual Studio, IDEA, Rider) have great builtin support for TDD (for example: automatically running tests after code changes) so manually doing things and thus slow development are a thing of the past...