On Writing Well by William Zinsser is a bestselling guide on writing well. Yep. Ben Jones parallels some of the principles in the book to visualization, seven principles in particular.
As I read On Writing Well it struck me that his advice for communicating well with words applies directly to the craft of communicating visually with data. His seven principles in Part I — The Transaction, Simplicity, Clutter, Style, The Audience, Words, and Usage — could be written about visualizing data as well.