book level operations

I'm wondering if there is a way to do a couple of things across all the files in a book.....

1. If I want to define a new paragraph tag, can I define it for all the files in the book at once? Or do I have to define it in each file individually?

2. Can I define and assign master pages for all the files in a book at once? Or again do I have to do it individually for each file?

Thanks

Tony