A software engineer at General Dexterity, a San Francisco robotics company with world-changing ambitions, Lois Clary codes all day and collapses at night, her human contact limited to the two brothers who run the neighborhood hole-in-the-wall from which she orders dinner every evening. When the brothers have Visa issues, they have one last delivery for Lois: their culture, the sourdough starter used to bake their bread. She must keep it alive, they tell her-- and learn to bake with it. Soon Lois is providing loaves to the General Dexterity cafeteria, then the farmer's market, and a whole new world opens up-- including a secret market that aims to fuse food and technology.

Lois Clary is a software engineer at General Dexterity, a San Francisco robotics company with world-changing ambitions. She codes all day and collapses at night, her human contact limited to the two brothers who run the neighborhood hole-in-the-wall from which she orders dinner every evening. Then, disaster! Visa issues. The brothers close up shop, and fast. But they have one last delivery for Lois: their culture, the sourdough starter used to bake their bread. She must keep it alive, they tell her; feed it daily, play it music, and learn to bake with it. Lois is no baker, but she could use a roommate, even if it is a needy colony of microorganisms. Soon, not only is she eating her own homemade bread, she's providing loaves daily to the General Dexterity cafeteria. The company chef urges her to take her product to the farmer's market, and a whole new world opens up.

"A new novel about an underground food community by the author of Mr. Penumbra's 24-Hour Bookstore"--

Lois Clary works at a San Francisco robotics firm, where long hours move her to regularly order in from a sandwich shop. The place is peculiar, but the food is amazing, especially the sourdough bread. When the brothers who run the shop leave town, they eagerly bestow their sourdough starter on their "number one eater". Though Lois is hapless in the kitchen, she soon masters baking so well her loaves catch the attention of her employer's in-house chef and, eventually, an elite invite-only farmers market. When Lois comes before the jury that decides who sells what at Bay Area markets, she encounters a close-knit club with no appetite for new members. But then, an alternative emerges: a secret market that aims to fuse food and technology. But who are these people, exactly?