An author can create an adaption by their own imagination or the real facts of something they are writing about in that genre. Adapting to something would be the finishing touches of something an author is creating.
Go looking for more sources is the option. Writing about something you're confused about is not a good choice. Plagiarism is never the right answer. And picking another research topic is not always a possibility and it's nonsensical to just give up on your original topic.
