Allegiant
I'm kinda peed off that I've spent God knows how many hours reading this series for that to be how the trilogy ends. Yeah, I gathered from the average rating that something happened that the readers weren't happy with but I didn't see that coming!
As a romance reader I'm definitely hacked off that it didn't end with sunshine and roses but at the same time I guess that with where the plot was going from the end of book 2 that there was no other way that it could end.
Being brutally honest, I'm just going to chuck out Insurgent and Allegiant and keep Divergent and think of it as a stand alone where Tris and Tobias live HEA.