diff --git a/templates/footer.html b/templates/footer.html
index 5c06315..aed6297 100644
--- a/templates/footer.html
+++ b/templates/footer.html
@@ -5,7 +5,8 @@
       <p> 
         <strong>Go Report Card</strong> by
           <a href="https://twitter.com/shawnps">Shawn Smith</a> and 
-          <a href="https://twitter.com/ironzeb">Herman Schaaf</a>.
+          <a href="https://twitter.com/ironzeb">Herman Schaaf</a>,
+          authors of <a href="https://leanpub.com/productiongo">Production Go</a>.
       </p>
       <p>Sponsored by:</p>
       <p>