Even if you have no letters to write, this book would be an informative read.
with lots of little hints and tips for more effective communication, i think this is a great, simple english - class refresher. the lessons within could be adapted and used for any kind of writing, eg: essays, stories, etc.
probably if it were used for it's intended purposes it would help you to write better letters too.
allan pease has a way of writing that keeps me reading every time i pick up one of his books. he has come through again!