I've had a habit over the last 10 years of gifting (I've learned to never 'loan' books to people anymore) used hardback 1971 editions of The Psychology of Compu

I've had a habit over the last 10 years of gifting (I've learned to never 'loan' books to people anymore) used hardback 1971 editions of The Psychology of Computer Programming (some bought as cheap as $0.13 + $3.99 S&H on Amazon). Probably given away away at least a dozen to friends & co-workers. For the handful who did more than skim it, it enriched their understanding about programming as a social activity. He left a great mark on the world, even if only a few of us truly appreciate it.