I'm reading this novelette (novella?) after I read the novels, and I enjoyed it more than any of them. Partly, I think, because the world-building is so limited; that was the aspect which really didn't work for me in the novels, so its absence is an advantage. Instead, this is a story based in character and emotion. If I don't find the wider world of Divergent that credible, the story of a teenager wanting to escape the abusive parent that he's terrified of, and taking desperate measures to do so, is far more believable. The unwavering focus on that particular story element made Four seem more relatable than he has been before.