The books look alright. I only read the samples. The testimonials from experts are positive. Maybe compare and contrast with Lox from Crafting Interpreters, whose author is not an ally but not known evil either. In terms of language design, there's a lot of truth to the idea that Monkey is a boring ripoff of Tiger, which itself is also boring in order to be easier to teach. I'd say that Ball's biggest mistake is using Go as the implementation language and not explaining concepts in a language-neutral fashion, which makes sense when working on a big long-lived project but not for a single-person exploration.

Actually, it makes a lot of sense that somebody writing a lot of Go would think that an LLM is impressive. Also, I have to sneer at this:

Each prompt I write is a line I cast into a model’s latent space. By changing this word here and this phrase there, I see myself as changing the line’s trajectory and its place amidst the numbers. Words need to be chosen with care, since they all have a specific meaning and end up in a specific place in latent space once they’ve been turned into numbers and multiplied with each other, and what I want, what I aim for when I cast, is for the line to end up in just the right spot, so that when I pull on it out of the model comes text that helps me program machines.

Dude literally just discovered word choice and composition. Welcome to writing! I learned about this in public education when I was maybe 14.