Mr. Penumbra's 24-Hour Bookstore

Young Ajax Penumbra has not arrived in San Francisco looking for free love or a glimpse of the technological future. He is seeking a book: the single surviving copy of the Techne Tycheon, a mysterious volume that has brought and lost great fortune for anyone who has owned it. The last record of the book locates it in the San Francisco of more than a century earlier, and on that scant bit of evidence, Penumbra's university has dispatched him west to acquire it for their library.

The Great Recession has shuffled Clay Jannon out of his life as a San Francisco Web-design drone - and serendipity, sheer curiosity, and the ability to climb a ladder like a monkey has landed him a new gig working the night shift at Mr. Penumbra’s 24-Hour Bookstore. But after just a few days on the job, Clay begins to realize that this store is even more curious than the name suggests. There are only a few customers, but they come in repeatedly and never seem to actually buy anything....

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.The Great Recession has shuffled Clay Jannon out of his life as a San Francisco Web-design drone - and serendipity, sheer curiosity, and the ability to climb a ladder like a monkey has landed him a new gig working the night shift at Mr. Penumbra’s 24-Hour Bookstore.