I find this guy pretty arrogant and a bit of a grand-stander, but maybe I get the wrong impression.
He did have a good idea once, namely to release his textbooks free in the internet before that became fashionable. That is still a good idea today. The textbooks are not the best of breed by a long stretch but we shouldn't diminish the fact that he released them.
If you think you can do it, do it, release it. Bask in the glory.
Prediction: he can't. But good luck anyway.