The only reason I kept reading this book is because the premise was interesting. The mystery of the puzzles and why Avery was chosen for all of this. The rest of it is... not good.
The writing is rudimentary and filled with cliches. The characters aren't really interesting and honestly some of them just get forgotten about throughout the book. There were too many to keep track of and that's probably why half of them got lost.
I didn't really like Avery as a main character. She was trying to be a "good person" who cares about systemic things like homelessness and the individual people affected by it, but yet she's so self-absorbed that she didn't care about what was happening in her best friend's life or her sister's. I get that it's a big change for her and she's only seventeen, but she never even thought about her sister and her friend Max rarely crossed her mind at all.
Also, the no swearing thing was so cringe-worthy. Every time it happened I died a little bit inside. It was mostly kept to one character, but at the beginning Avery was also doing it and it was just too much. I almost DNF'd just because of that.
Anyway, I think I'll try to continue the series, just to see if the mystery and the premise keep me interested again and go from there.