Do you want to have properties charaterizing a book to be added to the a new book when you create one? if so, this does not require a template, but just a tag: book
Next, do you want some nodes to be added to a book page; and some of those nodes to be property base? if so, this will be with a template, associated with a the tag: book
That change was introduced a few days ago. You must add those tags under Tag Properties
Those page properties will only be on the #book page, and not on each new book. But Tag properties will apply to all book.