Ask HN: What’s an older nonfiction title that’s relevant and blew your mind?

One of mine I taught a university course with, the psychology of perception. Not an easy read, the students hated me, but some understood what Gibson was on about. Deeply radical thought. Gibson once said psychology was a second rate discipline because it didn’t stand in awe of its subject matter. So true

Book: Edward S. Reed James J. Gibson and the Psychology of Perception (Yale)