i do not understand

Harry Potter in the classroom from cnn

i started reading this article becuase it had harry potter in the heading and i would have happily dismissed it after reading it but
"Parents Against Bad Books in School, which is based in Fairfax County, ranks the Harry Potter series 48th on its list of the 100 books that have sparked the most complaints. But it's far behind such classics as Harper Lee's "To Kill a Mockingbird," Mark Twain's "The Adventures of Huckleberry Finn" and J.D. Salinger's "Catcher in the Rye.""