Satisfying end to the trilogy. In previous books we followed 1 POV, but this time we have several, Control (MC of Authority), the Director (psychologist from Annihilation), Ghost Bird (character in Authority), Saul (lighthouse keeper from before Area X came to be), as well as a recounting of what happened to the biologist after events in Annihilation. 
 I have to recommend the entire Southern Reach trilogy (ANNIHILATION, CONTROL, and ACCEPTANCE). I found it creepy, unsettling, engrossing, many times unsure whether to believe our narrators or not, and in the end, definitely accepting that we would never get a concrete, absolute ending (nor would one have worked). An exploration of themes of what it means to be human, to be a part of nature while also trying to control it, what happens when we fail, and what would we choose in our own Area X. Yep, this is a purposefully vague review. It's a series that just has to be experienced. 
 If you need to have a very linear tale with everything answered, you will find this trilogy frustrating. If you are down for the ride and all of the twists and turns, then you should give this a try. 
 Of course, I read this just before we're set to go on some camping trips, but that should just make all the nighttime sounds more interesting (and creepy and give me weird dreams...)