I want to start by saying that given this is the author's debut novel, I'm immensely impressed with the clear amount of work she put into it. There are very few spelling or grammatical errors, she managed to weave together an interesting plot line, and she clearly has an idea for how worldbuilding works.
Unfortunately, that's where it stops for me. I'll preface this all by saying that I am not a fan of first person narratives in the first place. I find them extremely hard to do well and there are a lot of details that easily get left out, which is what I think happened here. The author clearly had an idea of what kind of world, story, and cast, she wanted to share, but all of it fell short. There is a lot of telling in this book when it needed more showing, again something I chalk up to the first person narrative.
I struggled with trying to understand the laws of the universe. We're in a civil war, there's no technology left (no computers), everyone uses swords...and guns?... but what does the world outside this war look like? What do normal people do everyday? Is the entire city wrapped up in this brawl between Assassin and Resistance? Who makes the food they receive on the trains? What's the government like? I have so so so many questions, which is great because obviously she created enough interest for me to want to ask these questions...but it would help a lot to have them answered.
The harder part for me as a reader was how difficult it was for me to relate to Silent, the Main Character. I never understood or empathized her split second decisions, her flares of anger, or her overall goal. Despite being in first person, I never felt like I was in her head, seeing the world through her eyes. And because I didn't understand her decisions, it was difficult to follow along with why things happened the way they did. She had plenty of flaws, as any good character should, but she had very few redeeming factors. And even one of the other characters mentions it at one point: she has to want to help herself.
So, overall, I want to reiterate that this is a helluva lot of work. I can see the passion and the hours and the thought that went into this, and for a debut novel, again, I am extremely impressed. It just needs more polish (and probably a different POV.)