A slideshow, in chronological order, showing Khan's growth as an architect and his concentration on the relationship between people and the buildings they live/work in.
Helvetica was produced in association with Veer, a design-house/type-house/art-house and all around culturally motivated kind of place (they have a free catalog that's worth ordering): http://www.veer.com/
Adolf Wolfli was confined to a mental asylum in Germany where he created a tremendous and complex body of work that included paintings, drawings, writing and combinations of all three.
A description of Albers book of prints from 1972. If you move your mouse over the upper left of the main image - you'll get the controls for a slideshow that shows some of the images from the book.
An unconventional - and very old print titled Werewolf by Lucas Cranach. There is no full moon, no fangs, no howling - just a yard littered with bodies and body parts and a horrific depiction of a small child being carried away in the mouth of a madman whose only indication of wolf-ness is what may or may not be long ears coming out of his hair.