If you are unfortunate enough to have this book as a required text for a class, take some words of advice: FIND A SUPPLEMENT! Ask your professor for something with more practice exercises and clearer explanations to go along with this text. I have yet to find another book at this advanced of a level with better explanations or one that includes Spanish grammar & linguistics in the manner of this book. However, "Manual de gramatica" by Dozier & Iguina (ISBN: 0838498329) gives fairly clear explanations, yet it is still on a pretty beginner/intermediate level, at least compared to this text.
In short, I absolutely despise this book; and its not even because I am not a native Spanish speaker. I feel pretty confident in my knowledge of Spanish grammar (at least, I did before I had this book assigned as a text!). As a warning, native Spanish speakers in my class are struggling with this text as well! If you can find a supplement, you will be all the more happier!
