From the Written Word to the Big Screen

In honor of GBF featured authors who will soon see their words hit the big screen -- such as Mary Downing Hahn whose book "‘Wait Till Helen Comes" will mark actress Jennifer Love Hewitt's directorial debut -- we thought we'd ask a question of our readers: What do you think are the best movies based on books? And, if you're feeling generous, why do you think a particular book-based movie was so successful?