I loved this book. This was actually one of the first dystopian books I have ever read! (The Hunger Games was first) 
 So let me explain what it's about. 
 Cassia Reyes, a seventeen year old girl at her Matching ceremony, gets matched (betrothed) to Xander, her best friend. Sure, she liked him. But she looked back and saw that someone else's face was on the screen (:O). It was Ky, another guy she knew. It may sound a little boring to you but it's great! And the dystopian part comes in where you find out that the Society, the leaders, choose what everyone eats, how many children they have, who they marry, and so on. It's really interesting. 
 Age recommendation: 12+ (ikr)