Lunar Chronicles is a series based on four different fairy tales, but with a Sci-Fi twist and there are 6 books in the series. The first book Cinder is based on Cinderella, the second book Scarlet is based on Little Red Hiding Hood, the third Cress is based on Rapunzel, and the fourth book Winter is based on Snow White. As for the other two books Fairest and Stars Above those two are side stories. Fairest is about the evil Queen Levana's life before she became evil and Stars Above is a book with short stories about the characters. Anyway the Lunar Chronicles is about a girl named Cinder who is Half-Human and Half-Cyborg who has to save the world from an evil Queen named Levana who came from the moon to try to take over the world, but in order for her to save the world and stop Queen Levana she has to team up with other people who are also based on fairy tales like the ones I mentioned before in order to stop Queen Levana from trying to take over the world. I'll just stop right there so that I don't spoil anything.