Try this again

<div id="gr_add_to_books">
<div class="gr_custom_each_container_">
 <a href="http://www.goodreads.com/book/isbn_to_id/0439139600" style="border:none" target="_blank"><img alt="Harry Potter and the Goblet of Fire (Harry Potter, #4)" src="http://www.goodreads.com/images/atmb_add_book-70x25.png?1306447144" /></a>
</div>
</div>

<!-- the identifier in the following script tag can be a GR book id or an isbn -->
<script language="javascript" src="http://www.goodreads.com/book/add_to_book_widget_frame/0439139600?atmb_widget%5Bbutton%5D=atmb_widget_1.png"></script>