An unabridged collection of the best-of-the-best science fiction stories published in 2015 by current and emerging masters of the genre, edited by Allan Kaster. In "My Last Bringback," by John Barnes, an expert on restoring the memories of Alzheimer's patients becomes her own patient. A young man living in a bubble habitat on the ocean floor of Venus must deal with terraforming gone awry in "The Tumbledowns of Cleopatra Abyss," by David Brin. In "Three Cups of Grief, by Starlight," winner of the British Science Fiction Association Award, by Aliette de Bodard, the death of a scientist in the...