Actually 3.5 stars. 
 I get why this book was overhyped. It was dystopian, everyone loved that kind of thing in 2011. But now, it is not the same hype as it was then about dystopian books. 
 The book follows the story of Beatrice/Tris, a girl from Abnegation which gets into Dauntless because she wanted it. Of course, nothing is red and we assist to an really awkward way to train the future Dauntless. She is Divergent, so there are exactly 2 things to be clarified: 
 a. She can't be controlled like the regular people can be. 
 b. She can fit in Abnegation, Erudite and Dauntless. Cool. 
 Her trainer is Four, which is really one of the coolest guys in books. And he is also one of the most bearable characters. Guess what, he falls in love with Tris. How convenient. 
 The book has a few minuses. One, there is lack of description, but this is only my opinion. Another one is that everything cool happens in the last hundred pages or so, and that kind of sucked. 
 It's a really fun read and entertaining, so if you don't want a really serious read, go for this one. I promise, it is not as THG rip off as it is said. I did not find many differences, except for the fact that they are both dystopias.