[montgomery_r]

Was it this one? https://reasonablypolymorphic.com/book/preface

- it does what you describe, at least! All the best for your search….

[syedkarim]

That’s not it, but your link is still good. Thanks!

What I remember (which may no longer be accurate) was that the site was similar in style to a web comic. And it started with an explanation of a bit.