Does anyone have any suggestions for intermediate chess books? Tactics or endgames would be the topic that I'd mainly like to focus on!
You cannot go wrong with the Yusupov and Aagaard series of books. Both are tremendous. Yusupov's books cover everything, and not in any order, so one day, you will get some tactics, endgames, and maybe even some opening stuff. They are very varied.
Yusupov was a top-10 player, multiple-time candidate, and considered one of the greatest trainers living today.
You might also like Quality Chess' "The Woodpecker Method", which is an immersion course in tactics.
You can find them here.
New in Chess also has a lot of books aimed at the intermediate market:
- Improve Your Chess Pattern Recognition
- Train Your Chess Pattern Recognition
- Strategic Chess Excercises
- Complete Manual of Positional Chess volumes 1 and 2.
Some of these are not tactics, but they are still problems that are designed to have you analyze.