MB has done an amazing job at creating an identity. It seems that some content of his stirs up small controversy on this forum, and while I can't pick apart the minutiae, it's clear on a high level that he has really made a place for himself as a person in the digital world. His work is interesting and beautiful, and is all related in a way that make it clear that he has a theme or drive which he is fulfilling.
From pollen to practical typography to his fonts and back to racket lessons. While I don't know the timeline of publishing, it seems each fit as a part of his path towards a goal, and he did the reader a service by publishing the meta-work. I see his racket lessons and pollen as the side result of goal to write his books, and so then became works themselves.