Mr. Penumbra’s 24-Hour Bookstore

Mr. Penumbra's 24-Hour Bookstore is a 2012 novel by American writer Robin Sloan. It was chosen as one of the best 100 books of 2012 by the San Francisco Chronicle, was a New York Times Editor's Choice, and was on the New York Times Hardcover Fiction Best Seller list as well as the NPR Hardcover Fiction Bestseller List. The US book cover, which glows in the dark, was done by Rodrigo Corral and chosen as one of the 25 best book covers for 2012 by BookPage.