This is the final book in the Unwind Dystology , so I'll talk about all 4 books here (not including the short story collection).

It's an incredibly weird experience to read these books. The whole concept of Unwinding (basically murdering teenagers to use as organ donors) is so disturbing and outlandish, but what makes it more tangible is the fact that especially in books 3 and 4, the author provides a lot of real world excerpts that show real world parallel, or rather, I assume the things where he got his ideas from. And some of those real world quotes are possibly even more disturbing than what's happening in the books.

Altogether, the books tell the story of a bunch of characters, most notably Connor, Risa and Lev, who are significant in all of them, and tie all the plots together. Throughout the books we also encounter a whole lot of other characters around them. Altogether, this makes the books really captivating to read, especially since the POV is switched up every now and then. Some are less fun to read (wow I hate Starkey so much), but altogether it's very well-written.

Character development is excellent, and some of these characters are literally unrecognizable by the end and after all they've been through. 

The books also put a lot of very philosophical questions into the open, and gives you a lot of food for thought on life, death and identity. 

I like to read books that trigger emotional responses and that make me think, and these books are definitely some that I'll be thinking about for a long, long time.