Sure, that'd be intermediate. It really depends on what you already know though, so it's hard to say.
First thing would still be to study tactics. That will never ever stop. There's even a tactics book by Volokitin for FMs and above. Apart from that, there's not much different stuff to suggest. How to reassess your chess by Sillman is a good book, etc. etc. etc.
Does anyone know any Chess books that teach more advanced strategies than the fork, the pin and stuff like that (which is what people ussually suggest when begginers ask for chess books) and start paving the road to get to around 1400 or 1600 elo (is that considered intermediate or is it still begginer?)
Books like Irning Chernev's Logical chess: move by move have worked for me, but I havent found much more than that
And id also like to ask if endgame studies can help at any level or if they are like openings, where you have to start learning them when you get a decent grip on tactics?