Here’s a selection of reference resources from the ALA Office of Intellectual Freedom, AAP, and others.
Official Web Site: BannedBooksWeek.org
+ (New) 50 State Salute Videos
From American Association for School Libraries
From Association of American Publishers
From the American Booksellers Foundation for Free Expression
From the Comic Book Legal Defense Fund
From ACLU of Texas
+ 16th Annual Banned Books Report (PDF)
Older editions of the report available here.