Banned books
Supreme Court
Bantam Books Inc. v. Sullivan, 372 U.S. 58 (1963)
Board of Education, Island Trees Union School District v. Pico, 457 U.S. 53 (1982)
Other
United States v. One Book Called "Ulysses," District Court, SD New York 5 F.
Supp. 182; 1933
Virgil v. School Board of Columbia County, Florida, 862 F.2d 1517 (11th Cir.1989)
Boyer, Paul, Purity in Print: Book Censorship in America from the Gilded Age to the Computer Age, University of Wisconsin Press, 2002
Foerstel, Herbert N., Banned in the U.S.A., Greenwood Press, 1994
Reichman, Henry, Censorship and Selection, Issues and Answers for Schools, American Association of School Administrators and the American Library Association, 1993
American Library Association Web site, including lists of recently banned books
Banned Books Online
The Censorship Pages
The File Room literature section, with extensive listing of historical, recent censorship incidents
YALSA Young Adult Library Services Association