e4 and d4 are the most highly recommended openings for white players
Books Recommended by Top Players

Magnus and Hikaru are probably not the best to ask about books for 1500 players
Of course. What I meant is that I couldn't find any books that they say they have read or recommend; the part about 1500+ is only for my current interest, while any books that Magnus or Hikaru recommend are for future reference.
Dvoretsky’s Endgame Manual, My System, and Zurich International Tournament 1953 are often mentioned by advanced players.
In the pursuit of chess knowledge, it's hard to know exactly what books are suitable for learning how to play more effectively; there are literally thousands of books. That being said, I would like to know some books recommended by top players such as Magnus or Hikaru (I couldn't find any recommended by them). More specifically, I would like to know books that cater to 1500+ players.