diff --git a/src/calibre/gui2/actions/edit_metadata.py b/src/calibre/gui2/actions/edit_metadata.py
index 4a527d94d8..60a943ccb9 100644
--- a/src/calibre/gui2/actions/edit_metadata.py
+++ b/src/calibre/gui2/actions/edit_metadata.py
@@ -54,6 +54,10 @@ class EditMetadataAction(InterfaceAction):
         mb.addAction(_('Merge into first selected book - keep others'),
                 partial(self.merge_books, safe_merge=True),
                 Qt.AltModifier+Qt.Key_M)
+        mb.addSeparator()
+        mb.addAction(_('Merge only formats into first selected book - delete others'),
+                partial(self.merge_books, merge_only_formats=True),
+                Qt.AltModifier+Qt.ShiftModifier+Qt.Key_M)
         self.merge_menu = mb
         self.action_merge.setMenu(mb)
         md.addSeparator()
@@ -206,7 +210,7 @@ class EditMetadataAction(InterfaceAction):
             self.gui.library_view.select_rows(ids)
 
     # Merge books {{{
-    def merge_books(self, safe_merge=False):
+    def merge_books(self, safe_merge=False, merge_only_formats=False):
         '''
         Merge selected books in library.
         '''
@@ -220,6 +224,12 @@ class EditMetadataAction(InterfaceAction):
             return error_dialog(self.gui, _('Cannot merge books'),
                         _('At least two books must be selected for merging'),
                         show=True)
+        if len(rows) > 5:
+            if not confirm('<p>'+_('You are about to merge more than 5 books.  '
+                                    'Are you <b>sure</b> you want to proceed?')
+                                +'</p>', 'merge_too_many_books', self.gui):
+                return
+
         dest_id, src_books, src_ids = self.books_to_merge(rows)
         title = self.gui.library_view.model().db.title(dest_id, index_is_id=True)
         if safe_merge:
@@ -234,6 +244,22 @@ class EditMetadataAction(InterfaceAction):
                 return
             self.add_formats(dest_id, src_books)
             self.merge_metadata(dest_id, src_ids)
+        elif merge_only_formats:
+            if not confirm('<p>'+_(
+                'Book formats from the selected books will be merged '
+                'into the <b>first selected book</b> (%s). '
+                'Metadata in the first selected book will not be changed.'
+                'Author, Title, ISBN and all other metadata will <i>not</i> be merged.<br><br>'
+                'After merger the second and subsequently '
+                'selected books, with any metadata they have will be <b>deleted</b>. <br><br>'
+                'All book formats of the first selected book will be kept '
+                'and any duplicate formats in the second and subsequently selected books '
+                'will be permanently <b>deleted</b> from your calibre library.<br><br>  '
+                'Are you <b>sure</b> you want to proceed?')%title
+            +'</p>', 'merge_only_formats', self.gui):
+                return
+            self.add_formats(dest_id, src_books)
+            self.delete_books_after_merge(src_ids)
         else:
             if not confirm('<p>'+_(
                 'Book formats and metadata from the selected books will be merged '
@@ -243,15 +269,10 @@ class EditMetadataAction(InterfaceAction):
                 'subsequently selected books will be <b>deleted</b>. <br><br>'
                 'All book formats of the first selected book will be kept '
                 'and any duplicate formats in the second and subsequently selected books '
-                'will be permanently <b>deleted</b> from your computer.<br><br>  '
+                'will be permanently <b>deleted</b> from your calibre library.<br><br>  '
                 'Are you <b>sure</b> you want to proceed?')%title
             +'</p>', 'merge_books', self.gui):
                 return
-            if len(rows)>5:
-                if not confirm('<p>'+_('You are about to merge more than 5 books.  '
-                                        'Are you <b>sure</b> you want to proceed?')
-                                    +'</p>', 'merge_too_many_books', self.gui):
-                    return
             self.add_formats(dest_id, src_books)
             self.merge_metadata(dest_id, src_ids)
             self.delete_books_after_merge(src_ids)
diff --git a/src/calibre/gui2/dialogs/confirm_delete.py b/src/calibre/gui2/dialogs/confirm_delete.py
index 4e0a259824..ff7f0a285a 100644
--- a/src/calibre/gui2/dialogs/confirm_delete.py
+++ b/src/calibre/gui2/dialogs/confirm_delete.py
@@ -31,4 +31,5 @@ def confirm(msg, name, parent=None, pixmap='dialog_warning.png'):
     d = Dialog(msg, name, parent)
     d.label.setPixmap(QPixmap(I(pixmap)))
     d.setWindowIcon(QIcon(I(pixmap)))
+    d.resize(d.sizeHint())
     return d.exec_() == d.Accepted