diff --git a/exploring.rst b/exploring.rst
index 3cf1987b5..d972b7a77 100644
--- a/exploring.rst
+++ b/exploring.rst
@@ -58,6 +58,7 @@ building your understanding of both the 2.x and 3.x versions of CPython:
     "`Green Tree Snakes`_", "The missing Python AST docs", Thomas Kluyver, 3.6
     "`Yet another guided tour of CPython`_", "A guide for how CPython REPL works", Guido van Rossum, 3.5
     "`Python Asynchronous I/O Walkthrough`_", "How CPython async I/O, generator and coroutine works", Philip Guo, 3.5
+    "`Coding Patterns for Python Extensions`_", "Reliable patterns of coding Python Extensions in C", Paul Ross, 3.4
 
 .. csv-table:: **Historical references**
    :header: "Title", "Brief", "Author", "Version"
@@ -77,6 +78,8 @@ building your understanding of both the 2.x and 3.x versions of CPython:
 
 .. _Python Asynchronous I/O Walkthrough: http://pgbovine.net/python-async-io-walkthrough.htm
 
+.. _Coding Patterns for Python Extensions: https://pythonextensionpatterns.readthedocs.io/en/latest/
+
 .. _Python's Innards Series: https://tech.blog.aknin.name/category/my-projects/pythons-innards/
 
 .. _Eli Bendersky's Python Internals: http://eli.thegreenplace.net/tag/python-internals