Wow. "Introduction to Computer Programming" was quite literally my first intruduction to programming. I didn't have access to a computer until several years later, so I just wrote programs on a piece of paper.
The 9-12yr old me had at least 5 of the books shown on that page in the early 80s :)
All the coding/gaming I did on my Spectrum lying down in front of the living room TV gave me these rough 'carpet callouses' on my elbows. They took at least decade to go away after I moved on from the Spectrum.