There are many books which are based on movie, e.g. Amazing Spider Man, Transformer, Toy Story...
Reading the book after watching the movie is good. My son (who is much older than your kid) likes to watch the movie for 10 mins and then read the relevant part of the book again and again. Since he likes watching movie so much, he can easily remember the lines of the movie. At one time, he repeated most of the lines after watching the movie.