Although this story was submitted two years ago, it has been a work in progress that seems to have been recently completed.
I haven’t read the book myself, but I’ve watched the YouTube lectures the author produced, and they were great. Quite accessible (for people who identify as programmers that have heard enough about category theory to want to learn more), and very mind-expanding. Although this submission is tagged “haskell”, no prior Haskell knowledge is required for the videos to make sense, and any Haskell notation is explained at first use (sometimes with C++ notation, which is likely to be a good deal more familiar).
I wonder if there would be any appetite for a collective effort to TeXify these posts? Similar to the EWD transcription project.
Just found that someone actually generated a PDF version.