This only received two stars from me because I really liked the concept, and there was also that darkly fascinating chapter that covered the actual process of unwinding. It gave me genuine shivers! 
 The rest of the book is a boring, dull plod that that somehow makes the original idea - three very different teenagers on the run from certain death - the most mind-numbing experience I have had in a while. I was constantly waiting for something big to happen and it never did. Until the end, which is how it earned its extra star. Sort of worth it. 
 The writing style was uninspired, the characters insipid, and I still don't get the 'Clappers' and probably never will. The ending was just strange. 
 (view spoiler)[ 
 Connor and Risa should never have gotten together, either. Why was this a thing? Ugh. 
 (hide spoiler)]