* The Design of Everyday Things * Design for the Real World * A Pattern Language * Notes on the Synthesis of Form * Never Leave Well Enough Alone * Don't Make Me Think * How Things Don't Work * Usable Usability * The Visual Display of Quantitative Information * A Theory of Fun for Game Design
Other left-field books I've found myself going back to for design inspiration more than I would've thought
* The Death and Life of Great American Cities * The Philosophy of Andy Warhol * Influence by Robert Caldini * Shakespeare: The Invention of the Human * The Art of Looking Sideways * Cosmos * Operating Manual for Spaceship Earth * The Theory of Moral Sentiments
And just specifically for computer UX, Smashing UX Design is a pretty good crash course.