diff --git a/src/calibre/ebooks/mobi/reader/mobi6.py b/src/calibre/ebooks/mobi/reader/mobi6.py
index eef167655e..1738347402 100644
--- a/src/calibre/ebooks/mobi/reader/mobi6.py
+++ b/src/calibre/ebooks/mobi/reader/mobi6.py
@@ -30,7 +30,12 @@ class TopazError(ValueError):
 
 
 class KFXError(ValueError):
-    pass
+
+    def __init__(self):
+        ValueError.__init__(self, _(
+            'This is an Amazon KFX book. It cannot be processed.'
+            ' See {} for information on how to handle KFX books.'
+        ).format('https://www.mobileread.com/forums/showthread.php?t=283371'))
 
 
 class MobiReader(object):
@@ -76,7 +81,7 @@ class MobiReader(object):
         if raw.startswith('TPZ'):
             raise TopazError(_('This is an Amazon Topaz book. It cannot be processed.'))
         if raw.startswith(b'\xeaDRMION\xee'):
-            raise KFXError(_('This is an Amazon KFX book. It cannot be processed.'))
+            raise KFXError()
 
         self.header   = raw[0:72]
         self.name     = self.header[:32].replace('\x00', '')
diff --git a/src/calibre/gui2/ui.py b/src/calibre/gui2/ui.py
index b16f96d893..06dea6bbb8 100644
--- a/src/calibre/gui2/ui.py
+++ b/src/calibre/gui2/ui.py
@@ -9,7 +9,7 @@ __docformat__ = 'restructuredtext en'
 
 '''The main GUI'''
 
-import collections, os, sys, textwrap, time, gc, errno
+import collections, os, sys, textwrap, time, gc, errno, re
 from Queue import Queue, Empty
 from threading import Thread
 from collections import OrderedDict
@@ -793,6 +793,19 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, EmailMixin,  # {{{
                     self._modeless_dialogs.append(d)
                 return
 
+            if 'calibre.ebooks.mobi.reader.mobi6.KFXError:' in job.details:
+                if not minz:
+                    title = job.description.split(':')[-1].partition('(')[-1][:-1]
+                    msg = _('<p><b>Failed to convert: %s') % title
+                    idx = job.details.index('calibre.ebooks.mobi.reader.mobi6.KFXError:')
+                    msg += '<p>' + re.sub(r'(https:\S+)', r'<a href="\1">{}</a>'.format(_('here')),
+                                          job.details[idx:].partition(':')[2].strip())
+                    d = error_dialog(self, _('Conversion Failed'), msg, det_msg=job.details)
+                    d.setModal(False)
+                    d.show()
+                    self._modeless_dialogs.append(d)
+                return
+
             if 'calibre.web.feeds.input.RecipeDisabled' in job.details:
                 if not minz:
                     msg = job.details