I bought this little book and it's companion book covering the actual course notes. They were the latest publications I could find covering this subject so hoped they would be the best. The course notes book is very good. Precise, accurate and covers all you need to know succinctly. However this exercise volume has so many errors and typo's in it as to render it almost completely useless. I am fairly comfortable with the course so when doing chart-work exercises was able to see who was right or wrong whenever my answer differed from that given here. Unfortunately this book was wrong on far too many occasions. It you were struggling with the chart-work exercises then these erroneous answers would only confuse you even more.
I tried the publishers web site for an errata but none seems to exist. Shame.
This could be a very good work if only it was editted much more closely.