I'm using this book to revise for my exam at the minute, and I've found that a lot of the content is very illogically structured. The author has a tendency to jump from one point to another without warning, then return to the previous point later on leaving you feeling muddled and forever having to go back and forth in the text to clarify things.
I have also found that sometimes the description of a certain point or case is very poorly worded, leaving you confused and having to research things yourself just to understand what the book is trying to say! This is only in certain bits of textbook but it is frustrating nonetheless as I was of the understanding that a textbook is meant to HELP you understand a point, not confuse you further!
I'm disappointed on the whole and I don't think the textbook is anywhere close to the standard of the other Directions books in the series.