I have a books called "The Yorkshire Terrier" by Deborah Wood and "Yorkshire Terriers for Dummies", and I've found both to be helpful. But, what I've found even more helpful is reading this forum. That way, you get real experiences from real people which is so much more valuable than anything you can read in a book. People here are always willing to answer questions, and I found the "Training" forum to be especially helpful before I got my yorkie, and I still refer to it.
