This review is spoiler free until otherwise indicated. I am a grown, well-read adult, who can tell the difference between a book that is bad, and a book that I don't like.
Ladies and gentlemen this book is BOTH.
Let's start with the writing itself. The pacing is shakey, action sequences are confusing, and the switching of perspectives is disorienting. It also did what NO sequel should ever do; recant on the victories of the previous books. Nothing alienates a reader like snatching away the hard won victories of the established canon.
Next, let's talk about the setting. What even IS the setting? It's pretending to be steampunk. Not only is the setting 8 years too late, it's not even very convincing. The descriptions aren't enough to put you in the time period, and it jumped the gun by adding BAD science and sudden robots. Anamatronics are a thing in steampunk, but these didn't feel like anamatronics. They felt like scifi robots someone painted bronze. This may be a failing of the writing or of the plot, either way it doesn't work.
The bad science is what really gets me though. It wasn't bad in the first book. The first book felt like good solid steampunk science. It even had developing vaccines. One of the victories recanted from the first book was the good science, adding bad x-man science. Anyone out of 5th grade will know that the lizard thing was ludacris.
Now the one thing that annoyed me about this book that I actually will forgive is how stupid the characters are. Because at least the stupidity feels in character. They are honestly just stupid kids doing the best they can and I can respect that.
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The virus not actually being a virus and instead being a poison made me want to tear out my hair. The vaccine plot from the previous book was so clever I loved it. I don't wanna talk about the kids turning into lizards because it makes me so. Angry. That's not only bad it's LAZY.
Adding Chester the Cheshire cat as an anamatronics was jarring. No where is it established that that level of robotics is in this world. And chip and curp later on was worse. I felt like I was reading fanfic of that stupid Robots movie with Ewan McGregor.
One last thing I want to complain about that isn't actually the fault of the book, rather a personal beef; the characters picked from the source material for this story was really weak. Maybe it's just been a while since I read Alice in wonderland. But I count 4 characters from the original book that made it into this one 6 if you count monsters. And Katt being the white queen was just disappointing. I hoped she was the Cheshire cat but then Chester appeared. I REALLY hoped she was the catterpiller when she was described with a hookah. Maybe I was looking too hard because I literally do not remember any more characters showing up? No dodo, no doormouse, no walrus, no rabbit (as a character. There was a rabbit hallucination). Did I miss some?
Tl;dr- this book was, at best, a chore to read. At worst, actually punishing to people who read the previous book. I am cranky.