Of all the books in the series, this was my favorite. although I did read this book in a younger age (6th grade) I reccomend it for older audiences, for the plot line may seem either confusing or completley inappropriate as the series continues on. Even it does not hold any 'experiences' for Tris, it does hint, and sometimes her... uhmm.... tests/hallucinations (blanking out) show some innapropriate scences and hinting. But I really loved it :) .