Once again, the finest SF short stories of the year have been collected in a single volume.With Year's Best SF 18, acclaimed, award-winning editor and anthologist David G. Hartwell demonstrates the amazing depth and power of contemporary speculative fiction, showcasing astonishing stories from some of science fiction's most respected names as well as exciting new writers to watch. In this anthology, prepare to travel light years from the ordinary into a tomorrow at once breathtaking, frightening, and possible with some of the greatest tales of wonder published in 2012.