This month it is the Middleton (WI) Public Library.
I took these photos during the 2015 Wisconsin Library Association Conference. The conference was held in Middleton, and the library hosted a little reception one evening.
I spun around the room and took several photos from where I was standing.
Unfortunately, the library is currently closed for roof repair, but you can read more about the library, and the City of Middleton, on their webpages.