[gimp-web] books: add "GIMP 2.6 Cookbook" from Packt Publishing

[Michael Natterer <mitch src gnome org>]

commit b058940e244292f99ea4bbda20bb0086a28b6d3c
Author: Michael Natterer <mitch gimp org>
Date:   Wed Apr 6 11:07:16 2011 +0200

    books: add "GIMP 2.6 Cookbook" from Packt Publishing

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+++ b/books/index.htrw
@@ -23,6 +23,28 @@
 </p>
 -->
 
+<h2>GIMP 2.6 Cookbook</h2>
+<p>
+  <img class="icon"
+       src="gimp-2-6-cookbook.png" 
+       alt=""
+       width="100px"
+       height="124px"/>
+  <strong>Author:</strong> Juan Manuel Ferreyra<br/>
+  <strong>Format:</strong> Paperback, 408pp.<br/>
+  <strong>ISBN-10:</strong> 1-84951202-7<br/>
+  <strong>ISBN-13:</strong> 978-1-84951202-2<br/>
+  <strong>Publisher/Date:</strong> Packt Publishing/March 2011<br/>
+  <strong>Website:</strong> <a href="https://www.packtpub.com/gimp-2-6-cookbook/book";>https://www.packtpub.com/gimp-2-6-cookbook/book</a><br/>
+  <br/>
+
+  <strong>Description:</strong> This book is packed with answers to
+  get you preparing great images with the GMP immediately. Even if you
+  are a relative novice to this powerhouse application, the
+  straightforward instructions will guide you through the tasks to
+  unleash your true creativity without being hindered by the system.
+</p>
+
 <h2>Beginning GIMP: From Novice to Professional, Second Edition</h2>
 <p>
   <img class="icon"