diff --git a/src/pyj/book_list/book_details.pyj b/src/pyj/book_list/book_details.pyj
index 446f86a149..a2883de25f 100644
--- a/src/pyj/book_list/book_details.pyj
+++ b/src/pyj/book_list/book_details.pyj
@@ -535,7 +535,7 @@ def render_book(container_id, book_id):
         imgdiv
     ))
     container = c.lastChild.firstChild
-    read_button = create_button(_('Read'), 'book', read_book.bind(None, book_id), _('Read this book'))
+    read_button = create_button(_('Read'), 'book', read_book.bind(None, book_id), _('Read this book [V]'))
     fmt = preferred_format(book_id, True)
     download_button = create_button(_('Download'), 'cloud-download', download_url(book_id, fmt),
         _('Download this book in the {0} format ({1})').format(fmt, human_readable(metadata.format_sizes[fmt] or 0)),