function appendEditBookForm( selector ) {
    var promise = $.get('templates/editBook.html');

    var newPromise = promise.then(function( template ) {

        var rawHtml = Mustache.render( template, book );

        var $form = $( rawHtml ); // Force jQuery to create the elements so we can manipulate them later..

        $( selector ).append( $form );

        return $form; // Return the jQuery object
    });


    return newPromise;
}

appendEditBookForm( "selector" ).done(function( $form ) {
    $form.css("background-color", "red"); // We can now manipulate it
});