Adding Custom Post/Meta Fields on Custom Post Types

Hello,

I have custom post types set up and running and now need to add custom fields which the single.php template will then pull into place.

There are tutorials for this but I can’t get any of them to work and wondered if someone could look at the code I’m using to create the custom post type in functions.php to see if there is a problem, or point out what I’m doing wrong.

The code is as follows:

add_action('init', 'books_register');

function books_register() {

	$labels = array(
		'name' => _x('Books', 'post type general name'),
		'singular_name' => _x('Book', 'post type singular name'),
		'add_new' => _x('Add New', 'portfolio item'),
		'add_new_item' => __('Add New Book'),
		'edit_item' => __('Edit Book'),
		'new_item' => __('New Book'),
		'view_item' => __('View Book'),
		'search_items' => __('Search Books'),
		'not_found' =>  __('Nothing found'),
		'not_found_in_trash' => __('Nothing found in Trash'),
		'parent_item_colon' => ''
	);

	$args = array(
		'labels' => $labels,
		'public' => true,
		'publicly_queryable' => true,
		'show_ui' => true,
		'query_var' => true,
		'rewrite' => true,
		'capability_type' => 'post',
		'hierarchical' => false,
		'menu_position' => 5,
		'supports' => array('title','thumbnail','revisions'),
		'taxonomies' => array('category', 'post_tag')
	  ); 

	register_post_type( 'book' , $args );

}

The site will list books and so I need to add quite a few custom fields, for binding information, reviews, author info etc etc.

All help appreciated!