15 August 2007 .   ^ "Barnes and Noble interview" . 19 March 1999" . http://www.accio-quote.org/articles/1999/0399-barnesandnoble.html . Retrieved 15 August 2007 .   ^ In Harry Potter and the Chamber of Secrets (when Harry Potter is 12 years old), chapter 8, partly focusing on the celebration of 500 years since the death of Nearly Headless Nick, J.K.