The most dangerous books in America?

The 10 most challenged titles of 2012 were:

1. Captain Underpants (series), by Dav Pilkey
   Reasons: Offensive language, unsuited for age group
   
2. The Absolutely True Diary of a Part-Time Indian, by Sherman Alexie
   Reasons: Offensive language, racism, sexually explicit, unsuited for age group
   
3. Thirteen Reasons Why, by Jay Asher
   Reasons: Drugs/alcohol/smoking, sexually explicit, suicide, unsuited for age group
   
4. Fifty Shades of Grey, by E. L. James.
   Reasons: Offensive language, sexually explicit
   
5. And Tango Makes Three, by Peter Parnell and Justin Richardson.
   Reasons: Homosexuality, unsuited for age group
   
6. The Kite Runner, by Khaled Hosseini.
   Reasons: Homosexuality, offensive language, religious viewpoint, sexually explicit
   
7. Looking for Alaska, by John Green.
   Reasons: Offensive language, sexually explicit, unsuited for age group
   
8. Scary Stories (series), by Alvin Schwartz
   Reasons: Unsuited for age group, violence
   
9. The Glass Castle, by Jeanette Walls
   Reasons: Offensive language, sexually explicit
   
10. Beloved, by Toni Morrison
    Reasons: Sexually explicit, religious viewpoint, violence

Source: American Library Association.