The number of books banned in public schools over the past year skyrocketed to more than 10,000, with two states—Iowa and Florida—responsible for most of them, according to preliminary findings released by PEN America on Monday.

Books bans have been an ongoing issue in the United States, especially in Florida. Whether or not it is a good idea to ban books in public schools,  there are people who argue that the First Amendment protects books from being banned.

New Jersey Gov. Phil Murphy signed a law to prohibit public libraries and school libraries from banning books and protect librarians who follow the law against liability.