Sneak into the sextion

You try to sneak into the barred off section. As you get closer you quickly look at the librarian. She appears busy with reading a book, and you soon make your way to the a iron door. It doesn't appear to have a knob... Weird. You look around and notice a large golden sigh above the door. It reads in bold letter "Forbidden Sextion". It appears that you won't be able to get in without some kind of spell.