Which film directed by American film and television director is based on a self help book?
Ken Kwapis: Kenneth William "Ken" Kwapis (born August 17, 1957) is an American film and television director and screenwriter. He's Just Not That into You (film): He's Just Not That into You is a 2009 American romantic comedy-drama film directed by Ken Kwapis, based on the self-help book of the same name by Greg Behrendt and Liz Tuccillo, which in turn was inspired by a line of dialogue in "Sex and the City".
He's Just Not That into You