I also added #default_form lines at the end of the Book and Author template pages, e.g. for the Author template page, the last few lines looked like:
<nowiki>
...
[[Category:Authors]]
{{#default_form:Author}}
</includeonly>
</nowiki>
and I did something similar for the Book template page. This way, every Book and Author page will have a "Edit with form" tab in addition to the "Edit" tab (and the "edit with form" tab is significantly more useful).