Closes #25910: fix dead and permanently redirected links in the docs. Thanks to SilentGhost for the patch.
diff --git a/Doc/library/tkinter.rst b/Doc/library/tkinter.rst
index fa60c15..f0d5d57 100644
--- a/Doc/library/tkinter.rst
+++ b/Doc/library/tkinter.rst
@@ -35,13 +35,13 @@
    `Tcl/Tk manual <http://www.tcl.tk/man/tcl8.5/>`_
       Official manual for the latest tcl/tk version.
 
-   `Programming Python <http://www.rmi.net/~lutz/about-pp4e.html>`_
+   `Programming Python <http://learning-python.com/books/about-pp4e.html>`_
       Book by Mark Lutz, has excellent coverage of Tkinter.
 
    `Modern Tkinter for Busy Python Developers <http://www.amazon.com/Modern-Tkinter-Python-Developers-ebook/dp/B0071QDNLO/>`_
       Book by Mark Rozerman about building attractive and modern graphical user interfaces with Python and Tkinter.
 
-   `Python and Tkinter Programming <http://www.manning.com/grayson/>`_
+   `Python and Tkinter Programming <https://www.manning.com/books/python-and-tkinter-programming>`_
       The book by John Grayson (ISBN 1-884777-81-3).