So, what can I say about the story without revealing too much? Clay, desperate for work after losing his Web design job, stumbles across a little place called Mr. Penumbra's 24-Hour Bookstore. It's in a seedy location (next to a strip club), there don't seem to be many customers, and the store itself is a little strange, but Clay needs the money. Besides, he's kind of intrigued. Most of the store's visitors never actually seem to buy anything, but rather check out mysterious volumes from a collection Clay is specifically told not to browse or otherwise look at too closely.
Clay's curiosity gets the better of him, and he starts to investigate. Slowly, at first, making a three-dimensional model of the store in order in order to see if there's a pattern to the checkouts. But then he involves other people and begins to dig more deeply.
