I just discovered this and found it very interesting.
Judy Blume: "It takes only one parent to challenge a book. It often takes a community to defend it."
M.E. Kerr: "Book banning has a mystique of its own, often one person in a community is the catalyst, often a troubled person displacing her/his own misery."
There are some excellent interviews with various authors of both children's and adult's books.
Oh, and here is a biography I want to read: 'Archie and Amelie': A Combustible Couple in a Torrid Descent Amid Opulence.