More a memoir than a how-to-write guide, but
4 estrellas
It's probably the closest we'll get to a proper memoir out of a very interesting & likeable guy, who's utterly unique in the publishing world.
Regardless of whether you are a fan of his actual output or not, you can't question his consistency, and as far as his style and approach to writing, he keeps it simple and straightforward, which for a beginning writer is really useful. And like all Stephen King works, it's an easy read that keeps moving.