In his much-anticipated new novel, Robin Sloan does for the world of food what he did for the world of books in Mr. Penumbra's 24-Hour Bookstore. When Lois Clary, a software engineer, is gifted a sourdough starter by two brothers who must leave the US, her whole world changes. Soon, she's baking bread and taking on a secret market that aims to fuse food and technology. Delicious and inventive.