Please note that I will write one review for all four of The Face on the Milk Carton series as I don't remember tehm all.  I read these all when I was eleven or twelve years old.  I remember that they were reasonably paced and enjoyable enough to read.  However, I still remember having two criticisms of this book: although the story is interesting, I remember finding it a difficult situation to relate to.  My second criticism is I remember asking myself why the author was still publishing books of this particular series.  I thought it was a bit dragged out.