I didn't expect to love this book so much, but wow, I loved it. Even though this is Levana's story and she is messed up, terrifying and really, really disturbing. I felt a bit sorry for her at first, but that didn't last past the first 50 pages. After that I was just disturbed by her thoughts and actions. Jeez, she is selfish! Still, I found her story extremely fascinating. 
 What a pair of sisters do Levana and Channary make. One who doesn't think at all and one who thinks too much. Channary who was careless and ignorant. Levana, wanting to have it all. I couldn't decide who was worse. Channary did awful things just to amuse herself, but then there was Levana with her big plans to take over the universe and get everything she wanted. It's disgusting really. 
 The best thing about this book was the backstory for the whole Lunar Chronicles. It gave the series so much more depth. And omg, Baby Cinder! Baby Kai! Yay for the backstory! 
 I definitely didn't expect that this book would make me cry, but I was wrong. The ending made me basically sob! (view spoiler)[Poor Winter! Poor Evret... Right when Evret was introduced I was pretty sure he would get killed at some point or something bad would be done to him and I was right. The ending caused such a weird mix of tears. Most were definitely for Winter and Evret, but some might have been for Levana. Some were tears of rage for sure. But some were probably because there's no going back now. That's when Levana became 100 % heartless. (hide spoiler)] 
 I think this is a must-read for everyone who loves the Lunar Chronicles. This adds so much to the story and is absolutely amazing! And it has those 3 chapters of Winter though I'm not sure if I'm going to read them or not.