Those books explores the possibilities of “universal design" and presents new approaches to visualizing complex information. I am a lucky owner of couple of them:)

“Data flow. Visualising Information in Graphic Design” R. Klanten, N. Bourquin, S. Ehmann, F. van Heerden, “De Gestalten”, 2008 
“Designing Universal Knowledge. The World as Flatland - Report 1”, Lars Müller, Baden, 2008
“Visual function. An introduction to information design”, Paul Mijksenaar, 010 Publishers, 1997
“The visual display of quantitative information”, Ed. R.Tufte, Graphics press, 1983
“Visual Explanations”, Ed. R.Tufte, Graphics press, 1997
“Envisioning information”, Ed. R.Tufte, Graphics press, 1990

and much more you can find here
http://tinyurl.com/ldh5gp