protected function parseContent( \DomDocument $xml, $chapter_title ) {

		$element = $xml->documentElement;
		$node_list = $element->childNodes;
		$chapter_node = '';
		$index = 0;

		// loop through child siblings
		for ( $i = 0; $i < $node_list->length; $i++ ) {

			$chapter_node = $this->findTheNode( $node_list->item( $i ), $chapter_title );
			if ( ! empty( $chapter_node ) ) {
				// assumes h1 is going to be first child of parent 'html'
				$index = $i;
				break;
			}
		}

		if ( $chapter_node ) {
			$chapter_title = strtolower( preg_replace( '/\s+/', '-', $chapter_node->nodeValue ) );
		}

		// iterate through
		return $this->getChapter( $node_list, $index, $chapter_title );
	}