Folktales and lore come alive, the dead rise, the depths of space are traversed, and magic threads itself through singular moments of love and loss, illuminating the circulatory nature of life, death, the in-between, and the hereafter. The Best American Science Fiction and Fantasy 2021 captures the all-too-real cataclysm of human nature, claiming its place in the series with compelling prose, lyrical composition, and curiosity's never-ending pursuit of discovering the unknown.