diff --git a/oml/meta/google.py b/oml/meta/google.py
index 10a7a07..09ee6fd 100644
--- a/oml/meta/google.py
+++ b/oml/meta/google.py
@@ -63,7 +63,7 @@ def info(key, value):
                 'publishedDate': 'date',
             }.get(key,key)] = _data[key]
 
-    if 'subtitle' in _data:
+    if 'subtitle' in _data and _data['subtitle'].strip():
         data['title'] = '{title}: {subtitle}'.format(**_data)
     if r['items'][0]['accessInfo']['viewability'] != 'NO_PAGES':
         data['cover'] = 'https://books.google.com/books?id=%s&pg=PP1&img=1&zoom=0&hl=en' % r['items'][0]['id']