Andrzej Sapkowski
Philip K. Dick
Umberto Eco
Henry Lion Oldi (two russian writers, if you find any of their book, you should buy it. They write very orignal fantasy books, so if you are bored of dragons, heroes, dwarfs, etc. you have to try them. But I think it's pretty hard to get any of their books outside Russia. In Poland the are onlu 4 books
I read much more, but here are favourite authors. Now I'm reading some H.P Lovercraft stories.