That was the subject line of an e-mail I got this morning from a reader who said he had just "stumbled across (and was intrigued by) your article My Top 10 Reasons to Bolt." He explained that Tufte is an expert on the display of information (his "Visual Display of Quantitative Information" is on the amazon.com "best 100 nonfiction books of the 20th century").
For those who, like me, have some issues with PowerPoint-laden lectures, he suggests
The Cognitive Style of Power Point, a pamphlet in which Tufte demonstrates why PowerPoint presentations(especially when used with "wizards") convey so little information.
Having just spent three days at a conference that exhibited PowerPoint use at its best and worst (mostly worst), I'm putting in my order today!