New Jersey Gov. Phil Murphy, a Democrat, signed a law Monday prohibiting public schools and libraries from banning books and protecting librarians who obey state law.

Murphy’s signing of the Freedom to Read Act comes amid an ongoing push by conservative lawmakers and activists across the country to challenge books they consider inappropriate for minors, particularly those about LGBTQ issues and race. Lawmakers in at least 13 states this year have introduced legislation to disrupt library services or limit their materials, according to an NBC News tally.

“Across the nation, we have seen attempts to suppress and censor the stories and experiences of others,” Murphy said in a statement. “I’m proud to amplify the voices of our past and present, as there is no better way for our children to prepare for the future than to read freely.”

In September, PEN America, a nonprofit dedicated to promoting free speech, reported that the number of books being removed from school shelves during the 2023-24 school year had tripled from the previous year, to more than 10,000. 

The PEN America report, along with one from the American Library Association released that same month, outlined how frequently challenged books are often about or written by people of color or those who identify as LGBTQ.

In 2023, the American Library Association’s list of the 10 most challenged books nationwide included Toni Morrison’s “The Bluest Eye,” a novel about a young Black girl who grew up after the Great Depression; Maia Kobabe’s “Gender Queer: A Memoir,” a graphic memoir about the author’s exploration of gender identity from adolescence to young adulthood; and George M. Johnson’s “All Boys Aren’t Blue,” a coming-of-age memoir about a queer Black man.

New Jersey is the third state to sign a law prohibiting the banning of books at public schools and libraries, following Illinois and Minnesota. 

The new law is set to take effect in a year from the governor’s signing. However, the state education commissioner and the New Jersey state librarian are permitted to start implementing it immediately “as may be necessary,” the law states. 

“Through this legislation, we are protecting the integrity of our libraries that are curated by dedicated professionals and making those resources available to help every student to grow as a critical thinker,” New Jersey acting Education Commissioner Kevin Dehmer said in a statement.