I wrote about this book in an earlier review. Well, I just want to add that the second part of Chapter 6 has become invaluable to me. It starts under the sub-heading More Words That Cause Confusion, Anger or Despair. This section taught me how much I still need to learn about words and how to use them.
The section is done alphabetically and goes through words that are confused, misunderstood or just quite often used wrongly. Here is an extract:
derisive or derisory?
The former means contemptous, as in a yell of derision; the latter means unworthy of serious discussion, as in a derisory offer.
This was very enlightening for me, I always get this mixed up. And, I could go on and on with quotes from this section. My eyes were indeed opened wide with shock at my own ignorance and at the amount of words that can be mixed up.
This section has become one of my most precious reference material now and if I am confused about a word it is one of the first places I will peruse for recourse.
It is also very useful if you use both British English and American English, as it describes some of the words that are can be confused with either spelling or meaning between the two forms.