So when I saw this being compared to The Hunger Games, I added it to my TBR straight away! I can see why it gets these comparisons, but there really is nothing alike, but that's not to say that Chain Gang All-Stars doesn't deserve the hype! I will admit I did feel a bit lost at times due to the different POVs and the timeline jumping about, but overall, I enjoyed it! The characters are complex, and I maybe wouldn't say likeable. 
What strikes me the most about this one is the footnotes, especially as lots of the facts and figures are true, and you can tell lots of research went into this!
And that ending, wow? That definitely upped the star rating for me