"Beloved" isn't the only book parents have challenged. Here's why and how books get banned.

Last month, Glenn Youngkin, Virginia's Republican governor-elect, targeted Toni Morrison's "Beloved" in a campaign ad that featured a parent upset that the 1987 novel was taught to her son when he was a high school senior.

It is not the only book of Morrison's, a Black woman, to be challenged in some communities – and as the debate over education again heats up, books have become a flashpoint around the U.S.

A wide variety of books have been challenged or banned for a wide variety of reasons, according to the American Library Association, which keeps a running list of the most challenged books in libraries and schools.