I found a paperback copy of The Midnight Library this afternoon around 3:15 pm, lying on the sidewalk in front of the Iowa City Public Library's College Street entrance, near the bike racks. It's a mass-market edition with a teal cover, slightly worn corners, and a small coffee stain along the back edge. There's a blue ribbon bookmark sticking out between pages around 120-125, and the pages show a bit of dog-eared wear. It seems well-loved but not damaged; I think it must mean something to the person who owns it. If this rings a bell for you, I'd really like to help get it back to you.
Approximate area where the item was last seen