I've been dying to read this one for a long time, ever since I read the synopsis and thought "whoa, that's different". Plus, it's written by an Asian author, I had to check it out. Luckily, Kat Zhang does a superb job with her debut novel and What's Left of Me is a book you don't want to miss. 
 Eva and Addie are as close as "sisters" can be, given that they're basically twins inhabiting one body. I like how Kat took the idea of twins and went a step further and asked "What if only one survived?". Even though their society pushed the fact that everyone must "settle", you get to see how a lot of the characters feel about their twin soul, losing them, missing them, etc. What's Left of Me was a lot more emotional in the familial sense than I expected. And I love that it was told from Eva's perspective, although I'd love to have like a novella from Addie's POV, especially after certain events happen where you'd really want to know what she thought about it. 
 Probably the only downside was not enough action happened through out the story, but I'm beginning to think that's the trend with dystopian novels, focusing on the world-building and establishing characters with the first book. Sure there was a rush of action towards the end and I found myself holding my breath a lot, but I could always go for more. Hopefully, the second book will have more action and drama between the main characters and the "evil organization". 
 Either way, What's Left of Me is an excellent dystopian and I'll definitely be adding the next book to my wish list! I have to know what happens next!