How to Compete in a Book vs. Documentation

I don't think that I have understood fully the MVC filter pipeline until I saw the diagrams that you created. How do you decide what goes in a book and what is something that you'd send someone up to the documentation for? It depends on what people are trying to get out of the book versus why they were going to the documentation. The docs team has really gotten their act together. They're even better than what I started the book to be honest.