From
Goodreads:
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
Robin Sloan did such a great job of building the world of
Mr. Penumbra's 24 Hour Bookstore that twice he had me googling character names and events just to be sure they were actually fictional.
Mr Penubra will launch many discussions about the things we value, and the decisions we make. The twenty-somethings in the book are wondering about the school and career decisions they've made while being caught up in an exciting 500 year old mystery.