Yes, Virginia, even the dictionary (and a history book) have been banned

Merriam-Webster Collegiate Dictionary

This dictionary was banned from a California classroom in 2010 when a parent filed a complaint that her child came across a term in the dictionary that the parent thought was too sexually explicit for children.

Source: R. Doyle. (2010). Books Banned or Challenged in 2009-2010.

A People’s History of the United States

Author:  Howard Zinn

This book was challenged in 2009 in a Virginia high school advanced placement class, “because the book is ‘un-American and leftist propaganda,’” (Doyle, 2009).  More recently, after the author’s death in 2010, former Indiana Governor Mitch Daniels attempted to have it banned from all classrooms in Indiana.  He then back tracked and claimed he only wanted it removed from eighth grade classrooms because children at that age are very impressionable.

Source: R. Doyle. (2007). Books Challenged or Banned in 2006-2007.