A blast from the past (well, in my narrow time frame) admittedly, but thought I’d link to it for more recent converts to the genre. China Miéville’s fifty fantasy & science fiction works that socialists should read.
This is not a list of the “best” fantasy or SF. There are huge numbers of superb works not on the list. Those below are chosen not just because of their quality—which though mostly good, is variable—but because the politics they embed (deliberately or not) are of particular interest to socialists. Of course, other works—by the same or other writers—could have been chosen: disagreement and alternative suggestions are welcomed. I change my own mind hour to hour on this anyway.
I’ve only read about ten or so of these titles, but it’s worth dipping into. Very much recommend Le Guin’s The Dispossessed, William Morris’s News From Nowhere, and Bulgakov’s The Master and Margarita.