Bringing together authors from all over the world who ponder “what if?” about important current topics, an ultimate anthology encompasses various sub-genres of science fiction and features such authors as Isaac Asimov, Ursula K. Le Guin, H. G. Wells, Margaret St. Clair, Philip K. Dick, Karen Joy Fowler, Cory Doctorow, Cixin Liu, Samuel R. Delany and more. Original.