Use & as author separator

And set properly the separators on other fields

templates/book_list.html

@@ -14,7 +14,12 @@
 		  <span class="text-muted">{{if .Publisher}}{{.Publisher}}{{end}}</span>
 		</p>
 		<div class="card-text row">
-		  <p class="col-9">{{range .Authors}}{{.}}, {{end}}</p>
+		  <p class="col-9">
+			{{range $i, $author := .Authors}}
+			  {{if $i}}<span class="text-muted">&amp;</span>{{end}}
+			  {{$author}}</a>
+			{{end}}
+		  </p>
 		  <div class="col-3">
 			<div class="btn-group d-flex justify-content-end">
 			  <a href="{{download_url .}}" class="btn btn-dark btn-sm">