Update index.html

index.html

@@ -50,7 +50,7 @@ <h2>Introduction to Analytics and Data Science</h2>
   <ul>
     <li><b><a style="text-decoration:none" href="https://github.com/guttag/Intro-to-Computation-and-Programming" target="_blank">Introduction to Computational Thinking and Data Science</a></b></li>    
     <li><b><a style="text-decoration:none" href="https://farid.berkeley.edu/downloads/tutorials/learnPython/" target="_blank">Introduction to Data Structures and Analytics</a></b></li>    
-    <li><a style="text-decoration:none" href="https://www.amazon.com.au/Numerical-Analysis-Timothy-Sauer/dp/013469645X/" target="_blank">Numerical Analysis</a></li>
+    <li><a style="text-decoration:none" href="https://www.amazon.com.au/dp/1292023589/" target="_blank">Numerical Analysis</a></li>
   </ul>
   <br>
   <hr>