While sci-fi writer Hugh Howey is best known for his novels Wool, Shift, and Sand, those three books actually began life as short fiction that he then collected into those larger tomes. Which bodes well for his new short story collection, Machine Learning: New And Collected Stories (hardcover, paperback, digital). While it has three stories that are part of the same Silo series as Wool and Shift, it also has two new stories, as well fifteen others that have never been collected in a book before, any number of which, he says, could be the beginning of a new novel.