I know a song that'll get on your nerves

I think I can understand why, when the decision was taken to adapt Sapphire’s novel Push for the big screen, they decided to change the title to Precious, the name of the central character. I presume it was at the insistence of the author that the original title still hung onto the movie by its fingertips, so that the full title of the movie is in fact Precious: Based on the Novel "Push" by Sapphire, a phrase as obese and inarticulate as the story’s heroine. But was it really necessary, when republishing the original book to tie in with the movie, to follow the same branding guidelines, so that the novel is now apparently called Precious: Based on the Novel "Push" by Sapphire as well? Could the author insist that the film should be retitled Precious: Based on the Novel Precious: Based on the Novel "Push" by Sapphire? Which would presumably also be the title of the next edition of the book, and then... it doesn’t bear thinking about.