Mr. Penumbra's 24-Hour Bookstore

Robin Sloan, 2012

After a layoff during the Great Recession sidelines his tech career, Clay Jannon takes a job at the titular bookstore in San Francisco, and soon realizes that the establishment is a facade for a strange secret. This quirky book about an old fashioned bookstore is mysterious and funny and informative all at the same time. Good book!
 
SG