I just read all of George R. R. Martin's books. What should I read next?

[Anonymous]

Lots of good recs here already. For fantasy, I'd add Ken Liu's Dandelion Dynasty series (4 books, really great worldbuilding and politics, making a good match for ASOIAF readers). And Perdido Street Station by China Mieville if you want some really different fantasy. NK Jemisin's work is also great, Broken Earth trilogy a good place to start.