1.The Adventures of Huckleberry Finn by Mark Twain
2.The Harry Potter series by J.K. Rowling
3.A Wrinkle in Time by Madeleine L'Engle
4.To Kill a Mockingbird by Harper Lee
5.A Light in the Attic by Shel Silverstein
6.James and the Giant Peach by Roald Dahl
7.The Dead Zone by Stephen King
To see the entire list, check out http://www.ala.org/ala/oif/bannedbooksweek/bbwlinks/100mostfrequently.htm.