I like the idea of learning how a programming language works. As today, almost every programmer is focused on getting the job done, but not how. We follow best practices, but we are still far from what you mentioned.
Knowing how the browser interprets the code, will impact our skills and will make us think what function is better and so which should we use when interacting with data, like for() and forEach() for example.
I would like to know when and if your book will be released :)