[cmyr]

From a brief bit of clicking around, the author has: designed several typefaces[1], written a long text on typography[cited previously], and has done enough programming to have developed the publishing framework he uses in his books[2], and to have written another book on a programming topic[3].

While I don't agree with much of this blog post, I certainly think the author has put in enough work to have their work taken seriously in this particular domain, and generally seems like a pretty interesting person.

1. http://practicaltypography.com/equity.html

2. http://docs.racket-lang.org/pollen/

3. http://beautifulracket.com

[OJFord]

I'll state just once more, in order to be absolutely clear that I harbour no ill intent: I have no reason to doubt, having been told, that the author can be regarded an authority on the matter. I'm simply saying that, approaching it fresh, it's not obviously the case, and other commenters' disregard should not be treated as that for a household name.