Created attachment 882083 [details]
Preface test

A preface is imported like so:

<preface>
	<title>Another Preface</title>
	<para>
		Some content
	</para>
</preface>

(note that <preface> is the root tag). All topics should be <section> elements and the builder will take care of wrapping it in the right element when building.

Attached is the book that created the invalid topic content.