Legend by Marie Lu
I really enjoyed reading this book. It kept me interested and guessing at what may happen next. The writing is great and the story was incredible. I loved the characters! The protagonists and the antagonists were engaging and interesting. The one thing I did not care for was the insta-love. It was, obviously, rushed and felt a bit out of place, but it wasn't so bad as to make me not like the book.
I think this is a fantastic book to read if you are interested in dystopian societies.