On this edition of our show, we speak with the Bay Area-based writer Robin Sloan, whose smart, tech-savvy, entertaining, and decidedly adventure-driven debut novel, "Mr. Penumbra's 24-Hour Bookstore," has been drawing some rave reviews. As critic Janet Maslin has noted in The New York Times, this book is a "slyly arch novel about technology and its discontents.... The culture clash at work here --- Google aces wielding the full, computer-assisted strength of their collective brainpower, one scholar fiddling with a quaint astrolabe --- has a topicality that works to this novel's advantage. Mr. Sloan fills his book with wittily-drawn prodigies, then makes them wonder how they can best use their new-tech talents." And as an enthusiastic summary in Kirkus Reviews puts it: "All the best secrets are hidden in plain sight. The trick is to notice the secret in front of you. Sloan's debut novel takes the reader on a dazzling and flat-out fun adventure, winding through the interstices between the literary and the digital realms. Art school graduate and former NewBagel web designer Clay needs a job. One day, he stumbles into Mr. Penumbra's store and, seemingly on the basis of his love for 'The Dragon-Song Chronicles,' lands himself a job as the night clerk. Narrow and tall, the bookstore is an odd place, with its severely limited selection of books to sell. Yet, just behind the commercial section, the shelves reach high toward the shadowy ceiling, crammed with a staggeringly large collection of books: a lending library for a small, peculiar group of people. Clay is forbidden to open the books yet required to describe the borrowers in great detail. Late-night boredom catalyzes curiosity, and soon Clay discovers that the books are part of a vast code, a code the book borrowers have been trying to crack for centuries. Could computers solve the paper puzzle? To assist him on his heroic quest, Clay collects a motley band of assistants. Among the crew is Kat, a Google employee and digital wizard, commanding code as well as a legion of distant computers. Neel, former sixth-grade Dungeon Master, is the financial warrior with his empire balanced on digital boob simulation. Book borrowers, cryptographers, and digital pirates all lend a hand, but the gray-suited Corvina opposes them with all the power of a secret society. From the shadows of Penumbra's bookshelves to the brightly lit constellation of cyberspace to the depths of a subterranean library, Sloan deftly wields the magicks (definitely with a 'k') of the electronic and the literary in this intricate mystery."