Dominican Liturgy), and use of the 1961 revised rubrics for collects as well as a couple other rubrical items, but it is eminently usable and in print!
A friar who uses it tell me that since the paper is thicker than that used in the original printing, so users will probably want to get a book-cover, e.g. one for a large Bible, so that lies flat. I believe it also needs ribbons and tabs. You can purchase it at Amazon or at many other used-book sites on the web.