adler marking up your books ref

intro.html

@@ -264,7 +264,12 @@ <h1><a href="index.html" style="text-decoration:none;">Robotic Manipulation</a><
     was that <i>great</i> writing can turn static text into a dialogue,
     transcending distance and time; perhaps I'm cheating, but technology can
     help me communicate with you even if my writing isn't as strong as Adler
-    would have liked!</p>
+    would have liked! Adler also recommends writing on your
+    books<elib>Adler41</elib>; you can print the pages, use the (infrequently
+    updated) <a
+    href="https://github.com/RussTedrake/manipulation/releases">pdf</a>, or
+    make private annotations right on the website using the same annotation
+    tool.</p>
 
     <p>I have organized the software examples into notebooks by chapter.  There
     is an "Launch in Deepnote" button at the top of each chapter; I'd encourage
@@ -504,6 +509,13 @@ <h1>State-space practice</h1>
 <span class="title">"Toward robotic manipulation"</span>, 
 <span class="publisher">Annual Review of Control, Robotics, and Autonomous Systems</span>, vol. 1, pp. 1--28, <span class="year">2018</span>.
 
+</li><br>
+<li id=Adler41>
+<span class="author">Mortimer J Adler</span>, 
+<span class="title">"How to Mark a Book"</span>, 
+<span class="publisher">The Saturday Review of Literature</span>, July 6, <span class="year">1941</span>.
+[&nbsp;<a href="http://www.maebrussell.com/Articles%20and%20Notes/How%20To%20Mark%20A%20Book.html">link</a>&nbsp;]
+
 </li><br>
 </ol>
 </section><p/>