The series is the first to the third and last volume absolutely enthralling, exciting and fascinating.
If the second part - in my opinion - is not quite as good as its advantages and Nachgänger it. The end I find - apparently unlike some other - simply perfect (which does not mean that it has voted me happy!).
The writing style of Veronica Roth is very clear, pleasant and emotionally; also the English is understandable with my school knowledge without any problems.
What I would like to highlight as particularly positive, is designing the characters. Rarely have I read a book in which I have found the people so authentic, human, asset value and their actions so understandable.
Even if the story of the book is pure fiction, I could take it much wisdom for my own life, which is also one of the reasons that I will never forget this book series and read every now and then.