This book just made me crazy and hungry for more even when all of it has ended. I loved the beautiful descriptions in the story, the way Tris and Tobias's characters were developed. The only thing was that the ending should have been less grieving. Tris's death drove me mad and I cried a hell lot. I didn’t get why the story had to end in such a way. The writing was, of course, also an important factor that made me shed tears. I just wished all of it could end a bit happily but things don't always turn out the way we want them to be. Anyways, I would very assuredly recommend this novel for thrill lovers. The plot has very clever twists, it is full of betrayals, grief of loss, love, sacrifices and all. It was an awesome experience having read this trilogy.