Euler has design of a homepage and there is a link back to the overview for each solution.

ipython/publish.py

@@ -7,6 +7,7 @@ import shutil
 from operator import itemgetter
 from collections import namedtuple
 from os.path import getmtime
+from bs4 import BeautifulSoup
 import json
 
 
@@ -56,6 +57,28 @@ def convert_solutions_to_html(solutions):
         if not os.path.isfile(html) or getmtime(html) < getmtime(s.ipynb):
             args = ["jupyter-nbconvert", s.ipynb, "--output-dir=html"]
             subprocess.call(args)
+            post_process(html)
+
+
+def post_process(html):
+
+    def tag(t, string="", children=[],  **attrs):
+        t = BeautifulSoup("", 'html.parser').new_tag(t, **attrs)
+        if string:
+            t.string = string
+        for c in children:
+            t.append(c)
+        return t
+
+    with open(html, 'r') as f:
+        soup = BeautifulSoup(f.read(), 'html.parser')
+
+    soup_h1 = soup.find("h1")
+    soup_p = tag("p", children=[tag("a", href="/euler", string="Back to overview.")])
+    soup_h1.insert_after(soup_p)
+
+    with open(html, 'w') as f:
+        f.write(str(soup))
 
 
 def ship_to_failx():