Thanks for the link. I ordered the print book five minutes ago and it will be good to have the PDF also.

I have used Haskell for years, but consider myself a novice at dealing with Monads, etc., while good at writing pure Haskell code. (I wrote a Haskell book, which is free on my website https://markwatson.com/books/).

A few years ago, I randomly had dinner with a math professor who specialized in Category Theory, and it was a very cool conversation. I hope that reading Emily Riehl’s book and listening to some of her teaching videos, that I can grok enough CT to enjoy it.