Veronica Roth explains about her world and also about why she would never write a book about Utopian worlds.
I learned some news things about the factions (like their manifestos). Really interesting stuff and I had a lot of fun in reading this.
Though I wish there was more. Like information about characters, or specific parts of the book. That would have made it even more awesome.
Would I recommend this? Yes, but don’t read this before you read the second book. There are not many spoilers but I feel this is best read after the second book.