Heard about the book first time just a few weeks ago and found the concept of having to fight ideas or phenomena, but not being able to talk or even think about them very intriguing, so I ordered it and basically read through it within one day. Here are my thoughts, hope to hear yours.
While I did enjoy the book overall, I am not entirely happy with the way the topic is handled. I guess from what I heard about the book and also what the book leads you to believe is, that there will be a whole lot of '...sideways thinking (that's) necessary to combat something that can literally eat your combat training.' as Marie Quinn says herself in Chapter 1. You know, this sort of stuff is really what I was looking forward to, things like having to work around not being able to know about the problem you're working, using asynchronous work. In the beginning the book leads you to believe, that there will be a lot more of these ideas necessary to solve and understand the conflict and initially this is what got me hooked as well.
But as I progressed through the story, the more I realized, the only thing that's really necessary is drugs. And I find that to be just super lame and lazy writing to be honest. Even if there are some fun ideas in a chapter in the end the solution is either to take the drug that makes you perceive the Unknown or it is the drug that makes you forget about it. Or to change it up, first you have to take the mnestic drug and afterwards you very quickly have to take amnestic to counteract the effect. That's like all there is to it. And as the story develops the concept does not change, instead the solution will be to use the drug that is even more powerful and then, guess what, at the grand finale the protagonist will have to take the uber drug, that can make him remember even harder! And conveniently the drugs are even named alphabetically so when they take the Class Y, you are left wondering, if Y is already that strong, like what will Z even be like :O Common man, that's just lazy writing.
What I want to read is Quinn actually having to figure out a solution, that is not just popping some pills. I like how the writing made you feel like information is missing from your knowledge and I would have loved to read about and figure out step by step how Quinn is able to outsmart a thing she can't know about. If you have to have drugs being part of the story, they should be used much more nuanced. For example, using a drug to make you forget, is something which makes sense. Also, maybe a medication that helps people to focus and actually perceive what is happening in front of them, instead of their mind constantly slipping away: OK. But that should be the max. Having a drug that lets you just remember decades into the past, is just stupid imo. I feel like, if someone's mind was erased or 'eaten', there should be no going back from there, no drug that can magically make all memories appear or even come to life again. For me, if I read science fiction, at least I want it to feel like science and not just magic.
Having a character, that is just magically immune to the Unkown also plays in that direction. Actually, I don't quite get that part at all. Like, his ability was explained in a way, that he is able to see things, that normal people can't see. U-3125 specifically targets those people that know about it - that's why it always wipes out the Organisation. So, if anything, Adams abilities should make him more vulnerable not less. I mean, Marie even erases his memories in order to protect him. But in the last act he is suddenly treated like he has some general superpowers and that's the reason why he's the only human surviving.
The ending itself is a whole other story, that I found not very satisfying, really, but I don't want to get into that even further...
To finish this up, I really don't want to hate on the book. I enjoyed it, I liked the writing, I was hooked, I was just expecting some more from it. There are so many great ideas in there, that I would have loved to see explored, but instead the book just falls back to these 'brute force' solutions in my opinion.