Harry Potter meets National Treasure. This fast-paced book is mystery, quest, and love letter to the written word, all rolled into one. In this rip-roaring adventure, the best secrets are hidden in plain sight, in the ancient volumes of a magical bookstore. It’s not technically brilliant, but plenty readable, engaging, and just plain fun. Book nerds, beware: you’ll want to climb Mr. Penumbra’s ladders and browse his shelves. Warm, friendly, and smart—and the cover glows in the dark. That’s hard to beat.

From the author of Mr. Penumbra's 24-Hour Bookstore, a "detective story set in an alternate San Francisco where the digital and the occult live side-by-side. Perfect for people who like Sherlock Holmes, Douglas Adams, ghosts and/or the internet."

From the publisher: "In his much-anticipated new audiobook, Robin Sloan does for the world of food what he did for the world of books in Mr. Penumbra's 24-Hour Bookstore. 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. 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."