> some reference books handy Looking at a random list [1] of O'Reilly books, I can see 3 categories: - The ones for beginners, like "Learning Python" or "Java

> some reference books handy Looking at a random list [1] of O'Reilly books, I can see 3 categories: - The ones for beginners, like "Learning Python" or "JavaScript: The Definitive Guide", - The ones that will be outdated even before reaching the shelves of a library, such as "Kubernetes in Action" or "Hands-On Machine Learning with Scikit-Learn, Keras, and TensorFlow", - The ones that are more about concepts such as "Clean Code". I can't see any of those being used as a reference book. The Internet and official documentations is the reference book. [1] https://www.toptechskills.com/top-tech-books/ https://www.toptechskills.com/top-tech-books/