Replace links to 2nd edition on amazon with a-fwd links

Author: marijnh

epub/frontmatter.xhtml

@@ -41,7 +41,7 @@
     and <a href="https://www.ghostery.com/"><img src="img/ghostery_mini.png"
     alt="Ghostery" class="logo"/></a>.</p>
 
-    <p>A <a href="https://www.amazon.com/Eloquent-JavaScript-2nd-Ed-Introduction/dp/1593275846">paper
+    <p>A <a href="http://a-fwd.com/com=marijhaver-20&asin-com=1593279507">paper
     version</a> of Eloquent JavaScript, including a bonus chapter, is
     being brought out by <a href="https://nostarch.com/">No Starch
     Press</a>. They also sell a more polished EPUB version that

pdf/book.tex

@@ -112,7 +112,7 @@
 
   \noindent You can buy a print version of this book, with an extra
   bonus chapter included, printed by No Starch Press at
-  \url{https://www.amazon.com/Eloquent-JavaScript-2nd-Ed-Introduction/dp/1593275846}.
+  \url{http://a-fwd.com/com=marijhaver-20&asin-com=1593279507}.
 
 {
   \hypersetup{hidelinks}