>I’ve been noodling on a static type system for my current hobby language.

As an inveterate language tinkerer for decades, Crafting Interpreters is like the intersection of Class A narcotic addiction, Feynman level understanding and religious enlightenment. It's in my top 3 favourite books of all time.

If you were to /happen/ to write an extension/follow up book that addressed static typing, then I can personally guarantee at least one sale.

Independent of that, thanks for the work as it stands. My copy is healthily dog-eared and still gets lugged around on holidays for refresh reading.