...Fine point you have made there. Obviously my massive intake of sodium from Chinese New Year feastings is making my brain cells shrink :|

Fifth book would be the closest to yours, methinks. I remember reading the first three chapters of book five online and thinking that it (a.) came from a different author (b.) was fanfiction, because I've only read the first book that time. XD Haven't read the last two books yet either, haha.