Is there a good book explaining Spanish subjunctive?

A very effective book is called Horizontes, Gramatica y conversacion, a colelge text book that clealy illustratets the tense with examples. However, the book is written completely in spanish

I don't know of a book specifically about the subjunctive but, practice makes perfect: complete spanish grammar, goes through the subjunctive in two units and can help with all of the other tenses as well. ____________________________________________________________________ There is a book called "Practice Makes Perfect: The Spanish Subjunctive Up Close," but it won't be released until July 31, 2008. There is currently a book for sale on Amazon called "Demystifying Spanish Grammar," which explains the subjunctive in two chapters.