This is an amazing book.
Taking place in New Beijing and after World War 4, this series, called The Lunar Chronicles, is a set of fairy tale retellings, with an extra twist: aliens. Well, not really aliens; these "other beings" are really just a colony of humans who have moved to the moon. However, they have developed an ability that allows them to manipulate the bioelectricity of living creatures. Basically they can make you do whatever they want. Another bad thing is an incurable plague that is slowly but surely killing off the majority of the population across the globe.
Cinder focuses on a cyborg girl named Cinder (surprise!), who is a mechanic. One day she's visited by the prince of the Eastern Commonwealth, Prince Kaito. This encounter sets off a chain of (somewhat) chance meetings and events that lead to visits from crazy moon queens to a poor cyborg girl who loses her foot while trying to run from a royal ball.