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 genres—looking at the world and asking, What if . . . ?   The Best American Science Fiction and Fantasy 2015 includes   Kelly Link, Neil Gaiman, Karen Russell T. C. Boyle, Sofia Samatar, Jo Walton, Cat Rambo Daniel H. Wilson, Seanan McGuire, Jess Rowand others  JOE HILL, guest editor, is the New York Times best-selling author of the novels Heart-Shaped Box, Horns, and NOS4A2 and the short story collection 20th Century Ghosts. He is also the writer of the comic book series Locke & Key.   JOHN JOSEPH ADAMS, series editor, is the best-selling editor of more than two dozen anthologies, including Brave New Worlds, Wastelands, and The Living Dead. He is also the editor and publisher of the digital magazines Lightspeed and Nightmare and is a producer of Wired’s podcast The Geek’s Guide to the Galaxy.