Annihilation, Authority and finally Acceptance tell a story about a strange government agency, Southern Reach, people associated with that agency and a very, very strange perplexing occurrence in an isolated location and some of the people who lived there. The end to me is like directions that say to get to X, go right then left, or go left than left, or right then right and so on. Any direction you take is both right and wrong. Read the trilogy and make your own decisions. That is only way to do it.