How can I create a custom post type with its own archive page?

<!-- BEGIN COPY / PASTE -->
    function my_custom_post_type() {
      $args = array(
        'labels' => array(
          'name' => 'Books',
          'singular_name' => 'Book'
        ),
        'public' => true,
        'has_archive' => true,
        'rewrite' => array('slug' => 'books'),
        'supports' => array('title', 'editor', 'thumbnail')
      );
      register_post_type('book', $args);
    }
    add_action('init', 'my_custom_post_type');
    <!-- END COPY / PASTE -->