You are responsible for what your child has access to, whether that is junk food, the internet, books, toys, what have you. The librarians are catering to the requests and needs of every part of their community. If you believe a mistake has been made in curation or cataloging (it happens,large libraries intake thousands of titles each year) then go through the appropriate channels.

Big tip, write your name on a piece of paper and slip it in on the page you want him to sign. That way it’s faster and he doesn’t have to ask how to spell your name.