title: How do you search by lccn using the PHP client?
body: <p>I am trying to use the Google PHP Client to access information about a book.
  I know the LCCN (Library of Congress Control Number) and want to use this as my search key.
  I cannot find documentation about how to format this type of key search using the php client (only JSONP).</p>
  
  <pre><code>&lt;?php
     require_once 'Google/Client.php';
     require_once 'Google/Service/Books.php';
  
     $client = new Google_Client();
     $client-&gt;setApplicationName('Get_Book_Covers');
     $client-&gt;setDeveloperKey('key goes here');
     $service = new Google_Service_Books($client);
  
     $results = $service-&gt;volumes-&gt;listVolumes('q=lccn:2005580010');
  
     foreach ($results as $item) {
        echo $item['volumeInfo']['title'], "&lt;br /&gt; \n";
     }
  ?&gt;
  </code></pre>