After searching libraries, the net, and schools for an accurate, good Dakota dictionary, I finally found this book. I was, to be blunt, amazed! Not only does it have a great listing of words (that you can actually use), but it also includes a short introduction of grammar and usage.
I got to test my new skills at a recent Powwow in Minnesota, where I had an entire conversation (although slow!) with a Dakota man. Although he needed to correct me on a few words and some grammar, he was impressed. He was shocked when I told him I had only begun learning within the last six months! I could not have done it without the aid of this book! HIGHLY RECOMMENDED!