Disgraced comedian Bill Cosby's Little Bill stories for children were among the most challenged books in U.S. libraries last year, the American Library Association announced.

The ALA said the series was No. 9 on its 2016 list of most challenged books, not because of the content of the tales themselves, but "because of criminal sexual allegations against the author."

Cosby, 79, recently was accused of sexually abusing dozens of women over the course of several decades.

He has denied all wrongdoing.

Topping the most recent ALA roster of challenged books is This One Summer written by Mariko Tamaki and illustrated by Jillian Tamaki. It was challenged "because it includes LGBT characters, drug use and profanity, and it was considered sexually explicit with mature themes."

Challenges against books were up 17 percent in 2016 compared to 2015. Many of the books challenged in 2016 contain sexual scenes, or gay or transgender characters.