What should I do first? read the book or watch the movie?

I had my fair share of annoying movie goers who laughed/giggled at the wrong scene and some kids behind me making noises.. Got distracted and went through the whole movie not knowing what to interpret or to think of the movie.. until I read the LoP threads in k/.

Realizing what I missed after reading these stuffs made me feel so overwhelmed. Gotta read the book.