Eight of the 10 most challenged books last year were based on L.G.B.T.Q. subjects or narratives, the American Library Association said in its annual ranking of books that were banned or protested in schools and public libraries.

One of them parodied Marlon Bundo, Vice President Mike Pence’s rabbit. Another told a story about a marriage between two men. Other books on the 2019 list were stories about children and transgender identity.

“This year, we saw the continuation of a trend of a rising number of challenges to L.G.B.T.Q. books,” said Deborah Caldwell-Stone, executive director of the library association’s Office for Intellectual Freedom, which compiles the list.

“Our concern is the fact that many of the books are age-appropriate and developmentally appropriate books intended for young people, but they are being challenged because they allegedly advance a political agenda or sexualize children,” she said. According to the association, the challenges came from parents, legislators and religious leaders.