2.5 stars. I tried to be nice and give this 3 stars but every time I think about it I groan because of how boring it was. 
 I can sum it up in 4 bullet points: 
 -Tris is depressed 
 -Tris suffers from PTSD 
 -Tris and Tobias fight A LOT 
 -Huge revelation at the end that tries to overshadow just how boring the book really is 
 Seriously, the whole book felt like a filler just for the ending. Suffice to say, I'm pretty disappointed in this book.