I have mixed feelings about this conclusion. Much of it is similar to my thoughts on Shift. The plotline following Donald and Charlotte went on far too long. By this point, seeing behind the curtain of Silo 1 wasn't exciting anymore. The characters felt strung along by the plot, surviving multiple unbelievable close shaves. 

The fate of Juliette and her Silos was much more interesting, but it was muddied by too many side characters. The plot of this series is definitely its strong point. The characters are very thin and samey. We spend a lot of time following their detailed thoughts, which aren't very interesting. I find Jules to be the only compelling one, but that may also be due to Rebecca Ferguson's portrayal of her. Perfect casting - I can't wait to see all this on screen! 

The stories of Silo 18 and 17 should have been pared down to focus on the main people (Jules, Lukas, Jimmy) so that the ending didn't feel as rushed. I liked it, but I could see it coming and there weren't enough quiet moments spent with the main characters before we got there. Too much padding of Donald & Charlotte and Silo 1 drama. I found myself skimming those chapters.

I feel this series will continue to work better on screen. I'm hoping we see more detail about the nanos. Because of the lack of scientific detail, they seemed almost magical in these books - the good nanos vs the bad nanos that ate everything. Them and the villainous humans always came off as cartoonish to me. While I enjoyed the books, they could have had more nuance and realism. The characters from Shift that actually seemed like humans making mistakes were taken out of the plot too quickly. But, this means I have high hopes for future seasons of the Silo TV show! 3.5 for this book and the series overall.