Comment by fullStackOasis

I like JUnit Recipes. While it's written years ago for Java, I like how you can jump around within each chapter and read about different problems that can be solved by running tests. Just reading the problems and the description of each recipe is enough to help you develop a test-driven mindset. You don't have to read any of the code samples if you don't want to. https://www.manning.com/books/junit-recipes

Disclaimer: I'm a friend of the author, so I'm biased, but I really do think the book is good.