Edward Tufte will be presenting his one day course entitled "Presenting Data and Information" in Providence on Sept. 22nd. Edward Tufte "writes, designs, and self-publishes his books on analytical design, which have received more than 40 awards for content and design. He is Professor Emeritus at Yale University, where he taught courses in statistical evidence, information design, and interface design." Those who attend his course will receive copies of each of his four books. Also for groups of 10 or more registering at one time (via phone) can receive a 25% discount.

I have not personally attend his course but know several people who have and have found it extremely informative. I do have three of his books and refer to them often.

For more information about the course see here. Also the RI Library system has several of his books if you are interested in seeing his work.