I didn't finish this, and maybe I'll go back and finish it when I can borrow a physical copy. I got about 75% through the audiobook and just found the protagonist, Tris, so FLAT. The dialogue and writing irked me, and though this is a small thing, I hated most of the characters names! They all sounded like Amish people or something. Not that I have anything against the Amish. The names sounded like the author put a bunch of names in a hat, shook it up and picked them blindfolded and decided to dub her characters as such. Also, while we are on the subject of characters, there were too many to keep up with. So many side characters, so little mental bandwidth. 
 I only picked this up because I saw the movie adaptation of book one and was curious to see what happened next. I think im better off following the films on this one.