Link to September 4 Anchorage Daily News story, "Palin pressured Wasilla librarian".
Back in 1996, when she first became mayor, Sarah Palin asked the city librarian if she would be all right with censoring library books should she be asked to do so.
According to news coverage at the time, the librarian said she would definitely not be all right with it. A few months later, the librarian, Mary Ellen Emmons, got a letter from Palin telling her she was going to be fired. The censorship issue was not mentioned as a reason for the firing. The letter just said the new mayor felt Emmons didn't fully support her and had to go.
Emmons had been city librarian for seven years and was well liked. After a wave of public support for her, Palin relented and let Emmons keep her job.