Science fiction and fantasy enjoy a long literary tradition, stretching from Mary Shelley, H. G. Wells, and Jules Verne to Ray Bradbury, Ursula K. Le Guin, and William Gibson. In The Best American Science Fiction and Fantasy award-winning editor John Joseph Adams delivers a diverse and vibrant collection of stories published in the previous year. Featuring writers with deep science fiction and fantasy backgrounds, along with those who are infusing traditional fiction with speculative elements, these stories uphold a longstanding tradition in both genreslooking at the world and asking, What if . . . ?