How many books has JK Rowling made in to films?

J.K. Rowling has had 8 of her Harry Potter books adapted into films:

* Harry Potter and the Sorcerer's Stone (2001)

* Harry Potter and the Chamber of Secrets (2002)

* Harry Potter and the Prisoner of Azkaban (2004)

* Harry Potter and the Goblet of Fire (2005)

* Harry Potter and the Order of the Phoenix (2007)

* Harry Potter and the Half-Blood Prince (2009)

* Harry Potter and the Deathly Hallows – Part 1 (2010)

* Harry Potter and the Deathly Hallows – Part 2 (2011)