An unabridged collection of the “best of the best” science fiction stories written in 2011 by current and emerging masters of the genre, edited by Allan Kaster. In “Dying Young,” by Peter M. Ball, cyborgs, clones and post-humans collide with a dragon bent on revenge in a post-apocalptic space western. “Martian Heart,” by John Barnes, chronicles a teenage couple taken to Mars as indentured servants in a “rags to riches” tale. In “Canterbury Hollow,” by Chris Lawson, two lovers on a planet orbiting a killer sun share their few remaining weeks together before they die. “The Choice,” by Paul McAuley, set in the author’s Jackaroo universe, follows two boys who set sail to investigate a beached alien vessel on the English coast. In “After the Apocalypse,” by Maureen McHugh, a mother and daughter traverse a ravaged U.S. in a tale that takes on McCarthy’s, The Road, from a female viewpoint. “Purple,” by Robert Reed, tells of a blind and maimed young man convalescing in an off-world menagerie of wayward alien species, prior to returning to Earth. In “Laika’s Ghost,” by Karl Schroeder, a Russian and an American search the steppes of the former U.S.S.R. for metastable weapons that terrorists could use to make nuclear bombs. “Bit Rot,” by Charles Stross, follows post-humans struggling to survive after their generation ship is struck by a Magnetar ray in this clever zombies-in-space tale. In “For I Have Laid Me Down on The Stone of Loneliness and I’ll Not Be Back Again,” by Michael Swanwick, Irishmen plot to strike back against alien occupiers by enlisting an Irish American tourist to their cause. Finally, Steve Rasnic Tem, tells of a young man awakened from suspended animation, on a future Earth, with the technological know-how of plant-like aliens in “At Play in the Fields.”