A gleeful and exhilarating tale of global conspiracy, complex code-breaking, high-tech data visualization, young love, rollicking adventure, and the secret to eternal life--mostly set in a hole-in-the-wall San Francisco bookstore

The Great Recession has shuffled Clay Jannon out of his life as a San Francisco Web-design drone--and serendipity, sheer curiosity, and the ability to climb a ladder like a monkey has landed him a new gig working the night shift at Mr. Penumbra's 24-Hour Bookstore. But after just a few days on the job, Clay begins to realize that this store is even more curious than the name suggests. There are only a few customers, but they come in repeatedly and never seem to actually buy anything, instead checking out impossibly obscure volumes from strange corners of the store, all according to some elaborate, long-standing arrangement with the gnomic Mr. Penumbra. The store must be a front for something larger, Clay concludes, and soon he's embarked on a complex analysis of the customers' behavior and roped his friends into helping to figure out just what's going on. But once they bring their findings to Mr. Penumbra, it turns out the secrets extend far outside the walls of the bookstore.

With irresistible brio and dazzling intelligence, Robin Sloan has crafted a literary adventure story for the twenty-first century, evoking both the fairy-tale charm of Haruki Murakami and the enthusiastic novel-of-ideas wizardry of Neal Stephenson or a young Umberto Eco, but with a unique and feisty sensibility that's rare to the world of literary fiction. Mr. Penumbra's 24-Hour Bookstore is exactly what it sounds like: an establishment you have to enter and will never want to leave, a modern-day cabinet of wonders ready to give a jolt of energy to every curious reader, no matter the time of day.

Robin Sloan grew up in Michigan and now splits his time between San Francisco and the Internet. He is the author of Mr. Penumbra's 24-Hour Bookstore and Sourdough.

Ari Fliakos is an actor with experience in television, radio, film, theater, and voiceovers. His narration of Seth Patrick's Reviver won an Audie for paranormal fiction. He has narrated Black Site and Tier One Wild by Dalton Fury, as well as Gangster Squad, The Inquisitor, and Shotgun Lovesongs. On screen, he is best-known for his roles in Law & Order, Pills, and Company K.