I found this book to be enjoyable. It is the second book in the Divergent trilogy and it centers around Tris figuring out more about why divergents pose a threat to Jeanine. We also meet Four's mother in this book which is very interesting and we also find out a little bit more about Tris' mother, what part does and did she play in the whole scenario. 
 I read this because I wanted to read it before the movie came out just so I would know how well it follows the movie. I also wanted to know what happens to Tris and Four because although they are flawed characters they are very likable. 
 I recommend this to mostly females although males might enjoy this as well. My sister has actually read all of these books and read them fairly quickly. 
 I am not a teenager so I am not reviewing this from the teen perspective. I think that it does work for people not in that age bracket.