This is floating around the internet, and has found a home on the online newspaper Crosscut. It was written by Ann Kilkenny, a politically active Wasilla resident. The article can be found here. About Sarah Palin: An E-mail from Wasilla
While Sarah was mayor of Wasilla, she tried to fire our highly respected city librarian because the librarian refused to consider removing from the library some books that Sarah wanted removed. City residents rallied to the defense of the city librarian and against Palin’s attempt at out-and-out censorship, so Palin backed down and withdrew her termination letter. People who fought her attempt to oust the librarian are on her enemies list to this day.