Science fiction and fantasy can encompass so much, from far-future deep-space sagas to quiet contemporary tales to unreal kingdoms and beasts. But what the best of these stories do is the same across the genres--they illuminate the whole gamut of the human experience, interrogating our hopes and our fears. With a diverse selection of stories chosen by series editor John Joseph Adams and guest editor Charles Yu, The Best American Science Fiction and Fantasy 2017 continues to explore the ever-expanding and changing world of SFF today, with Yu bringing his unique view--literary, meta, and adventurous--to the series' third edition.