On culture and design

The Culture of Design
by Guy Julier

Invention by Design: How Engineers Get from Thought to Thing
by Henry Petroski

Design by Society: Science and Technology Studies and the Social Shaping of Design (pdf)
by Edward Woodhouse and Jason W. Patton (in Design Issues)

Design Culture: An Anthology of Writing from the AIGA Journal of Graphic Design
Edited by Steven Heller and Marie Finamore