I regarded tango nuevo as just one of several styles out there until reading online that it is also a way of understanding the dance and its possible variations (given some assumptions as to what constitutes tango.) Having majored in math and struggled with tango, I was grabbed by that idea. I want to see their analysis! Since then, I have found some Web pages with complicated diagrams showing numerous possible moves but never a book that explains the principles and gives dancers ideas for using this important conceptual effort. Has anyone written a good book, or any book at all, explaining what Naveira and Salas determined? I know that such a book could be the first dangerous step toward a syllabus, which I doubt any lovers of tango (including those two) would want. But I also feel teased by references to an expansive logical analysis of tango -- which I would LOVE to read -- but can't find in publication anywhere.