College basketball coaches are often guarded about details concerning their programs. Practices are typically closed to the public. Coded keywords communicate plays to the players on the court. Many teams now go as far as to move their players off the bench and onto the court — and away from possibly nosy fans — before offering instructions during timeouts.

Then there is Xavier, one of the best teams in the country entering this week’s N.C.A.A. tournament. The Musketeers’ playbook is available to anyone who asks for it — literally.

With an openness that may be unmatched in Division I basketball, Coach Chris Mack and his staff at Xavier, in Cincinnati, regularly distribute an email newsletter — promoted right there on the team’s official website — to coaches across the nation and to countries around the world. And the newsletters reveal more than just motivational platitudes and marketing slogans. One is 81 pages long. Newsletter No. 174, from last spring, included 20 pages of diagrams explaining specific offensive plays that the Musketeers have run. Another billed itself as “the ultimate guide to packline defense.” A fourth offered a minute-by-minute breakdown of Xavier’s pregame routine.