I have one old copy of his Engineer's Notebook II with the Radio Shack Cat #276-5002 and the $2.49 price sticker. I want to say early 1980s give or take. I think the first version had a blue cover and this one is yellow. Somewhere buried around here I have a bunch of his notebooks along with other old books.When I ordered them from Amazon US many years ago, the postages was about the same as the book cost.
Allen