One of the books that has had the most influence on me is "The Design of Inquiring Systems: Basic Concepts of Systems and Organizations" by C. West Churchman. The book was published in 1971. I probably got my copy in the early 80s. The reason why I read the book at that time was not primarily because I wanted to, but because my teacher at that time, Kristo Ivanov, who would later become my PhD adviser was a big fan of Churchman. My copy of the book has long been missing. I do not even remember when I last saw it, but it is many years ago. I have over the years tried to get a new copy, but the book is out of print and used copies are very expensive. But, just a few days ago, I was re-arranging some books in my office and suddenly the book was there! It looks great! It looks like a book that is used a lot. It is full of notes and comments (see image). Thinking back on the time when I read the book and also met Churchman and heard him talk about his ideas, I am quite sure
Interaction Design, HCI, Philosophy of Design, Technology and Society