The May title is Mr. Penumbra's 24-hour Bookstore by Robin Sloan. Copies of the book are available at the EL Mirage Library Customer Service desk and online electronically through Overdrive on the Library’s homepage.

 Book synopsis: "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 façade for a strange secret. A 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."