In Pictures: The tech canon of today is the IT of ...
"Envisioning Information" by Edward Tufte (1990)
Tufte started from the premise that readers were busy, not stupid, and went from there to create a thoughtful primer on how to convey information clearly and meaningfully to the end user. Any geek who's been tasked with putting a human-friendly interface on any software tool can appreciate the examples and principles in this book.
In Pictures: The tech canon of today is the IT of tomorrow