If you're looking for an opening book, I recommend FCO Fundamental Chess Openings by Paul van der Sterren for any beginners/under 2000.

FCO is well written with many diagrams (sorry I hate reading move lists), and captures the amateur/pro metas as openings came and went out of favor through the years.

Also, all the cool kids play 960 now: https://en.wikipedia.org/wiki/Fischer_random_chess