diff --git a/src/server.cpp b/src/server.cpp
index 49700df3f..e44a08adf 100644
--- a/src/server.cpp
+++ b/src/server.cpp
@@ -831,6 +831,20 @@ Response InternalServer::handle_catalog(const RequestContext& request)
   return response;
 }
 
+namespace
+{
+
+std::string get_book_name(const RequestContext& request)
+{
+  try {
+    return request.get_url_part(0);
+  } catch (const std::out_of_range& e) {
+    return std::string();
+  }
+}
+
+} // unnamed namespace
+
 Response InternalServer::handle_content(const RequestContext& request)
 {
   if (m_verbose.load()) {
@@ -843,12 +857,7 @@ Response InternalServer::handle_content(const RequestContext& request)
 
   kiwix::Entry entry;
 
-  std::string bookName;
-  try {
-    bookName = request.get_url_part(0);
-  } catch (const std::out_of_range& e) {
-    return build_homepage(request);
-  }
+  const std::string bookName = get_book_name(request);
   if (bookName.empty())
     return build_homepage(request);