I don't know how I stumbled on this book but I was hooked from the get go and ran through it in 4 days.
I loved Joe, Lila, and his brother, even Carl from the get go. Once the code was broken, I guessed the full story but it didn't deter me.
I liked that every character, even the side ones, have some “baggage“ in their past.
Also, there's something about windows and sight throughout this book that has me still musing.