Mr. Penumbra's 24-Hour Bookstore

I have heard from some in the group who haven't been able to get the book Leviathan Wakes, so I've decided to change the book for October to Mr. Penumbra's 24 hour Bookstore by Robin Sloan. There seems to be a number of copies available in the library.
The book centers around Clay Jannon, a tech programmer who is out of a job. He ends up getting a new job in a local bookstore as the night clerk and tries to do analysis into what some of the recurring night customers are reading and why.