Well, at least finding inspiring examples of ways to visualize complex information is easier thanks to www.visualcomplexity.com. The site does a nice job of capturing many excellent information visualization approaches all in one place.
Don Koberg: The Universal Traveler
Early thoughts and primers on the creative process and design thinking.
William Lidwell: Universal Principles of Design: 100 Ways to Enhance Usability, Influence Perception, Increase Appeal, Make Better Design Decisions, and Teach Through Design
A good reminder of 100 things to check when designing. (****)
Christopher Alexander: The Timeless Way of Building
Revisiting the themes put forward in this first of three books in a series by Christopher Alexander.
NEIL POSTMAN: Technopoly : The Surrender of Culture to Technology
A classic gut check for those enamored with the technology pervading our lives. (****)
Barry Schwartz: The Paradox of Choice : Why More Is Less
Trying to choose wisely.