new book to add to the website

Dear www team,
the following  us a patch to add a new book I've co-authored with
Enrico, hope it is fine for the addition on PostgreSQL web site.

Regards,
Luca



modified   templates/pages/docs/books.html
@@ -10,7 +10,23 @@
       <th>Information</th>
     </tr>
   </thead>
-    <tbody>
+  <tbody>
+      <tr>
+          <td>
+              <a
href="https://www.packtpub.com/product/learn-postgresql-12/9781838985288">
+                  <img
src="https://static.packt-cdn.com/products/9781838985288/cover/smaller"
+                        alt="Learn PostgreSQL" />
+              </a>
+          </td>
+          <td>
+              <strong>Title</strong>: Learn PostgreSQL<br/>
+              <strong>Authors</strong>: Luca Ferrari, Enrico Pirozzi)<br/>
+              <strong>Language</strong>: English<br/>
+              <strong>Current version at publication</strong>: 13<br/>
+              <strong>Format</strong>: Paperback, eBook<br/>
+              <strong>Published</strong>: October 2020
+          </td>
+      </tr>
       <tr>
         <td>
           <a href="https://postgrespro.com/education/books/introbook"><img