If you're looking for an excellent book on emotional eating, I highly recommend Susan Kano's book Making Peace with Food. It's a really helpful book/workbook that will help you create a healthier relationship with food. It's been around for years.
I also recommend reading some of the great Spark articles on emotional eating too. have you read any of those ? if not, why not start with these ?? www.sparkpeople.com/resource/wellness_arti
The reason there isn't one good book on emotional eating is because there is no single reason why some people are emotional eaters and some aren't. Ultimately, you could consider therapy. Some times, food isn't the reason we eat. Some other emotion drives us to eat. Which is where a good therapist could help you work through your issues with food.