diff --git a/manual/conversion.rst b/manual/conversion.rst
index 46f8bcd3a0..f60a16acdf 100644
--- a/manual/conversion.rst
+++ b/manual/conversion.rst
@@ -5,21 +5,23 @@
Ebook Conversion
===================
-|app| has a conversion system that is designed to be very easy to use. Normally, you just
-add a book to |app|, click convert and |app| will try hard to generate output that is as
-close as possible to the input. However, |app| accepts a very large number of input formats,
-not all of which are as suitable as others for conversion to ebooks. In the case of
-such input formats, or if you just want greater control over the conversion system,
-|app| has a lot of options to fine tune the conversion process. Note however that |app|'s
-conversion system is not a substitute for a full blown ebook editor. To edit ebooks, I
-would recommend first converting them to EPUB using |app| and then using a dedicated EPUB editor,
-like `Sigil `_ to get the book into perfect shape. You can then
-use the edited EPUB as input for conversion into other formats in |app|.
+|app| has a conversion system that is designed to be very easy to use.
+Normally, you just add a book to |app|, click convert and |app| will try hard
+to generate output that is as close as possible to the input. However, |app|
+accepts a very large number of input formats, not all of which are as suitable
+as others for conversion to ebooks. In the case of such input formats, or if
+you just want greater control over the conversion system, |app| has a lot of
+options to fine tune the conversion process. Note however that |app|'s
+conversion system is not a substitute for a full blown ebook editor. To edit
+ebooks, I recommend first converting them to EPUB or AZW3 using |app| and
+then using the Tweak Book feature to get them into perfect shape. You can then
+use the edited ebook as input for conversion into other formats in |app|.
-This document will refer mainly to the conversion settings as found in the conversion dialog,
-pictured below. All these settings are also available via command line interface to conversion,
-documented at :ref:`ebook-convert`. In |app|, you can obtain help on any individual setting by holding your
-mouse over it, a tooltip will appear describing the setting.
+This document will refer mainly to the conversion settings as found in the
+conversion dialog, pictured below. All these settings are also available via
+command line interface to conversion, documented at :ref:`ebook-convert`. In
+|app|, you can obtain help on any individual setting by holding your mouse over
+it, a tooltip will appear describing the setting.
.. image:: images/conv_dialog.png
:align: center
diff --git a/src/calibre/utils/sigil.py b/src/calibre/utils/sigil.py
deleted file mode 100644
index 69bb0be263..0000000000
--- a/src/calibre/utils/sigil.py
+++ /dev/null
@@ -1,17 +0,0 @@
-#!/usr/bin/env python
-# vim:fileencoding=UTF-8:ts=4:sw=4:sta:et:sts=4:ai
-from __future__ import with_statement
-
-__license__ = 'GPL v3'
-__copyright__ = '2009, Kovid Goyal '
-__docformat__ = 'restructuredtext en'
-
-from calibre.utils.filenames import find_executable_in_path
-from calibre.constants import iswindows
-
-def find_executable():
- name = 'sigil' + ('.exe' if iswindows else '')
- find_executable_in_path(name)
- #if path is None and iswindows:
- # path = search_program_files()
-