I knew Ed back in the day. It was a lot of fun watching him interact with my programming staff, mostly C++ programmers. Trying to get them to see that objects printing themselves resulted in excess coupling. Or trying to get programmers to write things down. I still remember laughing when he told them something to the effect of “programmers shouldn’t wear illiteracy as a badge of honor”. Essays on Object Oriented Software Engineering was a good book in the early 90s.