Authority is the weakest book in VanderMeer's trilogy, but I understand why he wrote it. He wanted us to really get to know Control, the new director of the Southern Reach. Control is a troubled soul, a middle-aged man who really doesn't know what he wants. He's a loner for starters, the son of a domineering mother and an artistic father. His mother is part of the organization, Central, that Control works for. His mother pulls a lot of strings, including for him. You could almost say that she is the puppeteer and he the marionette. They have a strange relationship, very difficult to define. The book is difficult to categorize overall, but it has its creepy, hair-raising moments. As I wrote in my review of the book on Goodreads:
There are whole passages in Authority that are downright creepy, e.g., when Control discovers what Whitby has been doing and where he has been doing it. The description of his meeting in the 'secret room' with Whitby will make your hair stand on end. Or when the building wall dissolves, and the former director shows up. I live for those moments in these kinds of books. VanderMeer has a way of building up the anticipation of something bad that's going to happen, even if it doesn't at exactly that time, as when Control visits the director's house. But you know disaster is coming. When he writes like that, this book is at its best. But there are also whole sections that are too drawn-out; I suppose VanderMeer wanted to enforce the idea that Control was a pawn in Central's bureaucratic game (and in his mother's as well). But this means that there are long descriptions of bureaucracy and chain of command, and of events that are illogical at best, e.g. why Lowry was the Voice. But in a place like Southern Reach, it would perhaps be hard to expect anything but irrationality and chaos. VanderMeer is a very good writer, but the book could have been shorter without losing any of the 'atmosphere'. I am currently reading Acceptance and hope that the mystery of Area X is explained satisfactorily.
After I finish reading Acceptance, I will read Roadside Picnic. I'm looking forward to reading the book that led to the films Stalker and Annihilation. And after that I will watch a few more Alex Garland films, although I've already seen 28 Days Later and Ex Machina, both of which are excellent. If you haven't seen them, I recommend them highly.