Welcome to the Best of the Masterworks: A selection of the finest in science fiction-Black-cloaked Sarah Canary is the ugliest woman Chin Ah Kin could ever imagine.

But after she wanders into a railway camp in the Washington territories in 1873, Chin is ordered by his uncle to escort her away.

Far away. What should be simple journey quickly escalates beyond Chin's control, into a series of adventures and misadventures that are at once hilarious, deeply moving, and downright terrifying.

Who - or what - is the mysterious Sarah Canary? And why can't Chin leave her, even for his own good?Co-founder of the James Tiptree Jr.