The single page letter can become a powerful, multi-functional tool. It is a Bill Corbin medium that can be deployed swiftly and inexpensively for letters, bulletins or updates (mini-newsletters).
For the CEO, this vehicle becomes the answer to important communication that sometimes doesn't happen because of Tyranny of the Urgent. Note link to example of persuasive communication.
The extent to which Corbin wordcrafting can enhance your communication needs some discussion. It is real and powerful