Curious, do you remember the title of that Fortran book? Was it a for kids book or an actual textbook? It sounds like a great place to dive into Fortran, from what you described.
I distinctly remember it was the numerical recipes book, and the language used was Fortran 77; so, it was an actual textbook.
However, I really didn't understand much, until my father explained it to me in very simplified terms. The concepts are pretty simple, the details are not.
