Add Harvard Classics Shelf of Fiction collection

src/epub/content.opf

@@ -52,6 +52,8 @@
 		<meta property="collection-type" refines="#collection-1">series</meta>
 		<meta id="collection-2" property="belongs-to-collection">The Human Comedy: Scenes from Parisian Life</meta>
 		<meta property="collection-type" refines="#collection-2">series</meta>
+		<meta id="collection-3" property="belongs-to-collection">Harvard Classics Shelf of Fiction</meta>
+		<meta property="collection-type" refines="#collection-3">set</meta>
 		<dc:description id="description">A young man tries to climb up the cutthroat Parisian social ladder during the Bourbon Restoration.</dc:description>
 		<meta id="long-description" property="se:long-description" refines="#description">
 			&lt;p&gt;&lt;i&gt;Father Goriot&lt;/i&gt;, today considered one of &lt;a href="https://standardebooks.org/ebooks/honore-de-balzac"&gt;Balzac’s&lt;/a&gt; most important works, is part of his novel sequence &lt;i&gt;The Human Comedy&lt;/i&gt;. It’s the first of Balzac’s novels to feature recurring characters, a technique that he famously developed in his subsequent novels.&lt;/p&gt;