I was 9 years old in 1987 when my dad bought the first family computer: a Macintosh SE. HyperCard immediately captured my imagination and I remember spending many long hours working on my stacks and pouring over this very guide, and pining for the critical second half of the documention the HyperCard Script Language Guide.

It's hard to describe how out of reach basic documentation seemed to a child at the time compared to today where anything you want to learn about programming is readily available for free to anyone with an internet connection.