Proper Gauge

Along the way we see those two characters developed much more than the first novella and we see how the Silo works and lives. For what I gathered it has more than 140 floors that took them two days from up to botton.
It was also interesting to meet our new character. She is a mechanic and rather enthusiastic girl who sees engineering as her group. I say this because, for what the author describes us is that there isn't that much mingling between the floors which adds a little more to the realistic feeling of a apocalyptic fiction where everyone knows his place for the system to work.
The ending was not at all predictable. I was like that emoticon :O --- yeah. That was me. I am going to read the next novella in the near future. Top notch Herr Hugh Howey.