the filmmakers just follow the books 
(ROOT (S (NP (DT the) (NNS filmmakers)) (ADVP (RB just)) (VP (VB follow) (NP (DT the) (NNS books)))))
(ROOT (S (NP (DT ) (NNS )) (ADVP (RB )) (VP (VB ) (NP (DT ) (NNS )))))