Robin Sloan’s book has all of the elements of wonderful and unforgettable story. There are a quirky set of characters led by the clerk of Mr. Penumbra’s 24-Hour Bookstore, Clay Jannon. With help from his roommates, childhood friend, and new girlfriend, Clay attempts to figure out what is really going on at the unusual bookstore. He unknowingly stumbles on a 500 year mystery and embarks on an epic journey. Humorous and well written with a great narrator, this is wonderful novel to listen to.