Three comics -- Persepolis, Saga and Drama -- were among the 10 most frequently challenged books last year in U.S. public schools and libraries, according to the American Library Association. This appears to be the most comics to make the list.

The organization released the annual findings of its Office of Intellectual Freedom as part of National Library Week. In 2014, the OIF received 311 complaints to remove or restrict materials in public libraries or in school curricula, up only slightly from the year before.

Persepolis, Marjane Satrapi's memoir of her life as a child and young adult in Iran during the Islamic revolution, came in at No.2, with complaints frequently citing "gambling, offensive language [and] political viewpoint" as well as its "graphic depictions." Although the ALA doesn't note specific challenges, we reported last year on incidents in Oregon and Illinois.

The bestselling space opera by Brian K. Vaughan and Fiona Staples, Saga landed at No. 6, with challengers arguing that it's "anti-family," sexually explicit and unsuited for certain age groups, and that it contains nudity and offensive language.

Drama, Raina Telegemeier's popular graphic novel about friendship and crushes set against the backdrop of a middle-school stage production, caps off the Top 10. It's most frequently targeted as being sexual explicit.

Here’s the Top 10 List of Frequently Challenged Books of 2014:

1) The Absolutely True Diary of a Part-Time Indian, by Sherman Alexie

Reasons: anti-family, cultural insensitivity, drugs/alcohol/smoking, gambling, offensive language, sex education, sexually explicit, unsuited for age group, violence. Additional reasons: “depictions of bullying”

2) Persepolis, by Marjane Satrapi

Reasons: gambling, offensive language, political viewpoint. Additional reasons: “politically, racially, and socially offensive,” “graphic depictions”

3) And Tango Makes Three, Justin Richardson and Peter Parnell

Reasons: Anti-family, homosexuality, political viewpoint, religious viewpoint, unsuited for age group. Additional reasons: “promotes the homosexual agenda”

4) The Bluest Eye, by Toni Morrison

Reasons: Sexually explicit, unsuited for age group. Additional reasons: “contains controversial issues”

5) It’s Perfectly Normal, by Robie Harris

Reasons: Nudity, sex education, sexually explicit, unsuited to age group. Additional reasons: “alleges it child pornography”

6) Saga, by Brian Vaughan and Fiona Staples

Reasons: Anti-Family, nudity, offensive language, sexually explicit, and unsuited for age group. Additional reasons:

7) The Kite Runner,by Khaled Hosseini

Reasons: Offensive language, unsuited to age group, violence

8) The Perks of Being a Wallflower, by Stephen Chbosky

Reasons: drugs/alcohol/smoking, homosexuality, offensive language, sexually explicit, unsuited for age group. Additional reasons: “date rape and masturbation”

9) A Stolen Life, Jaycee Dugard

Reasons: drugs/alcohol/smoking, offensive language, sexually explicit, and unsuited for age group

10) Drama, by Raina Telgemeier

Reasons: sexually explicit