I’ve heard people say they don’t buy books anymore, claiming that everything they want to learn is available on YouTube or somewhere on the web. I regularly buy books. Sometimes I pick up something in a completely new area to broaden my knowledge, and sometimes to deepen it in an area where I already have experience. Since I work as an educator and create the courses I teach, a book can be a great resource to validate the scope of a course or the way I explain a topic.
Book: Test-Driven Development with Java