A parody children's book depicting Vice President Mike Pence's pet rabbit as gay was one of the most challenged books in public libraries in 2018, the American Library Association announced Monday.

Every year, ALA's Office for Intellectual Freedom releases a list of "most challenged" book titles based on either the books being banned from public libraries or libraries receiving requests to ban titles. A total of 483 books were challenged in 2018, but some were challenged far more frequently than others, according to ALA.

The most challenged book was "George" by Alex Gino, a novel for young readers about a transgender boy. Second on the list was "A Day in the Life of Marlon Bundo" by Jill Twiss. The book was created by the team at the HBO show "Last Week Tonight with John Oliver" to criticize Pence's positions on LGBTQ marriage and gay rights. The story features Pence's pet rabbit Marlon Bundo as a gay bunny and is a parody of a children's book written by the vice president's daughter, Charlotte, and illustrated by his wife, Karen, titled "Marlon Bundo's A Day in the Life of the Vice President."

ALA noted that its list provides only a snapshot of actual challenges taking place. As many as 97 percent of challenges go unreported or are not covered by the media, according to the group.

The other titles on this year's list are:

3. "Captain Underpants" series, written and illustrated by Dav Pilkey. Reasons: for including a same-sex couple, perceived as encouraging disruptive behavior.

4. "The Hate U Give," by Angie Thomas. Reasons: for profanity, drug use, sexual references, deemed "anti-cop."

5. "Drama," written and illustrated by Raina Telgemeier. Reason: for LGBTQIA+ characters and themes.

6. "Thirteen Reasons Why," by Jay Asher. Reason: for addressing teen suicide.

7. "This One Summer," by Mariko Tamaki, illustrated by Jillian Tamaki. Reasons: for profanity, sexual references, certain illustrations.

8. "Skippyjon Jones" series, written and illustrated by Judy Schachner. Reason: for depicting cultural stereotypes.

9. "The Absolutely True Diary of a Part-Time Indian," by Sherman Alexie. Reasons: for profanity, sexual references, religious viewpoint.

10. "This Day in June," by Gayle E. Pitman, illustrated by Kristyna Litten. Reason: for LGBTQIA+ content.

11. "Two Boys Kissing," by David Levithan. Reason: for LGBTQIA+ content. http://tinyurl.com/yxq97utc

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