Let Freedom Read!

There you are, sitting in CavBlock listening to your advisor, when all of a sudden you hear some yelling coming from the library. You rush in to see what's going on. You find Mrs. Gregory looking horrified, staring at a locked box. You also see an angry group of people shouting something about wanting to keep dangerous books away from students. They seem to be saying they want to get rid of the books in the box. Mrs. Gregory tries talking to them, but they are angry! She looks at you, and you all decide to help. Can you solve the clues to unlock the box and keep the books safe?!?!