It's a shame this book is out of print. This book has been the best pocket reference guide I've ever used. Even though I have many other grammer and writing guide books, this is the one I keep going back to and the one that keeps getting passed around the office. The book gives easy-to-comprehend explanations and usage examples for nearly all grammer questions. The 'Use It Right' section of the book is great when you can't remember when to use lie or lay.

If you can find it, I recommend you buy it.