Do not overdo on books.
'Chess books should be used as we use glasses: to assist the sight, although some players make use of them as if they thought they conferred sight.' - Capablanca
You should not study more than 20 books in your whole life.
Here is a list of good chess books
https://rafaelleitao.com/chess-books-grandmaster/
What are good chess books for a 1400-1600 rapid rated player? I've heard that there are a lot of books that really aren't useful and I'm looking for advice on which ones are good and which ones are bad.