If you follow the best seller’s list, the novel, Mr. Penumbra’s 24-Hour Bookstore, likely hit your radar in a major way. Author Robin Sloan’s first novel shared a tale set inside a mysterious San Francisco bookstore, and spread like wildfire among bibliophiles around the world.

Answering the call to rabid fans, Sloan recently released his second novel, a book called Sourdough. The book tells the story of Lois Clary, a tech-type who discovers a love of food when given the supreme responsibility of keeping a sourdough starter alive. To do this, she’s instructed to feed it, play music for it, and learn to bake with it.

This charge ferments into something bigger than Lois could ever have imagined, opening doors and unveiling secrets that combine food and technology – the staples of Lois’ new sourdough life.

This Friday, Robin Sloan appears at a free event at the Petaluma Copperfield’s Bookstore (140 Kentucky St.) to share about Sourdough and sign copies. The event takes place 7-8:30 p.m. While tickets are free, reservations are requested. Find out more at copperfieldsbooks.com/event/robin-sloan.

Purchase the book at Copperfield’s, or find other places of purchase at Robin Sloan’s website, robinsloan.com.