How Long 'til Black Future Month?

How Long 'til Black Future Month? is a collection of science fiction and fantasy short stories by American novelist N. K. Jemisin. The book was published in November 2018 by Orbit Books, an imprint of the Hachette Book Group. The name of the collection comes from an Afrofuturism essay that Jemisin wrote in 2013. Four of the 22 stories included in the book had not been previously published; the others, written between 2004 and 2017, had been originally published in speculative fiction magazines and other short story collections. The settings for three of the stories were developed into full-length novels after their original publication: The Killing Moon, The Fifth Season, and The City We Became.