Palin found offensive books that included "inappropriate language," but there seems to be no actual list; however, as Mayor of Wasilla, Palin did ask the town's librarian how she (Palin) could go about banning books.
(As a side note: I don't think heated political argument has a place in this lighthearted thread because some people take their politics very seriously. Also, Palin did not fire the librarian, but she made the job so untenable that the librarian resigned.)