This is a must have writer book. Any person that will be writing, professionally, academically, creatively, etc needs this book.
There are great examples of the different rhetorical styles and exercises to get an individual comfortable with them. The entire book is like all the English grammar classes you have ever had crammed into one book and it makes sense.
In addition to that, the book has MLA and APA styles listed exhaustively. There is very little that is not included.
In my opinion, if you are a writer, a student, or a parent with a student in high school or college, you need this book in your possession.