Each year, the ALA's Office for Intellectual Freedom records hundreds of attempts by individuals and groups to have books removed from libraries shelves and from classrooms. See Frequently Challenged Books for more details.
According to the Office for Intellectual Freedom, at least 46 of the Radcliffe Publishing Course Top 100 Novels of the 20th Century have been the target of ban attempts.
The titles below represent banned or challenged books on that list ( see the entire list here). For more information on why these books were challenged, visit challenged classics and the Banned Books Week Web site.
A Clockwork Orange by 
A Farewell to Arms by 
A Separate Peace by 
All the King's Men by 
An American Tragedy by 
Animal Farm by 
Beloved by 
Brave New World by 
Brideshead Revisited by 
Cat's Cradle by 
Catch-22 by 
For Whom the Bell Tolls by 
Go Tell It on the Mountain by 
Gone with the Wind by 
In Cold Blood by 
Lady Chatterley's Lover by 
Lolita by 
Lord of the Flies by 
Native Son by 
Nineteen Eighty-Four by 
Of Mice and Men by 
One Flew over the Cuckoo's Nest by 
Rabbit, Run by 
Slaughterhouse-Five by 
Song of Solomon by 
Sons and Lovers by 
Sophie's Choice by 
The Awakening by The Call of the Wild by 
The Catcher in the Rye by 
The Color Purple by 
The Grapes of Wrath by 
The Great Gatsby by 
The Jungle by 
The Naked and the Dead by 
The Satanic Verses by 
The Sun Also Rises by 
The Time Machine, the Invisible Man, the War of the Worlds by 
Their Eyes Were Watching God by 
To Kill a Mockingbird by 
Tropic of Cancer by 
Ulysses by 
William Faulkner by 
Women in Love by 