I read the free chapter. One thing I noticed right away was that I think some things can be hard for people with not so much knowledge about the topic: under each headline, it explains a concept from the ground up, no knowledge required. Like "the syntax of a language is...". But just a few sentences in, advanced topics are touched, like assembly instructions, not explained. It feels a bit like "the curse of knowledge", where it's hard to know what the other party knows. But if the reader needs to learn what syntax means, they will probably not understand the next sentences.
So, I think more consistency could improve the product.
This is of course just my meaning and interpretation of the text, it might not be relevant. But maybe something to have in mind for your next masterpiece :)