I'll keep this short. I've enjoyed the previous books in The Lunar Chronicles but this book was a huge disappointment. It adds very little to the series and could have been quite easily edited down into a short story and put on Marissa Meyer's Wattpad page. The book tells us practically nothing about the Moon's history and culture and (although we do get to learn more about her relationships with Cinder's mother and Winter's father) tells us very little about Levana that we didn't already know. This book certainly didn't need to be over 200 pages long and I feel annoyed that I had to spend as much time cringing over Levana and Channary's behaviour as I did :(
The only two things that I liked about Fairest were: 1) the brief glimpses that we got of Cinder, Winter and Jacin and 2) the fact that Meyer doesn't try to excuse Levana's behaviour in it. Yes, terrible things were done to Levana but that still doesn't excuse all of the terrible things that she then went on to do to other people. She's still an unrepentant murderer and rapist who deserves to be punished for everything that she's done.