WhisperT

WordPress Goodreads Bookshelf (aka Bookshelf) allows you to display a custom list of books from your <a href="http://goodreads.com" rel="nofollow ugc">Goodreads</a> shelves anywhere on your site that PHP is allowed.
<ul>
<li>You can choose from any one of your bookshelves including your custom shelves on <a href="http://goodreads.com" rel="nofollow ugc">Goodreads</a>.</li>
<li>You can specify how many books it should retrieve from the shelf and how often it should update the list on your site.</li>
<li>You have full control of how the list is displayed using your own HTML and CSS. So you can easily make it blend in with the rest of your blog.</li>
<li>If you have a private account on <a href="http://goodreads.com" rel="nofollow ugc">Goodreads</a> there are specific instructions to set up Bookshelf so that it retrieves your books, but your profile can still remain private.</li>
<li>You can use all the standard information (title, author, cover image, isbn) as well as some more detailed information such as rating, date read, review, and many more.</li>
</ul>
Lots more features to come…

WordPress Goodreads Bookshelf

Display a custom list of books from any of your Goodreads.com bookshelves, and stylize it however you want using your own HTML and CSS.

Stephan Elst

This plugin allows you to share your the books you are currently reading as a widget on your WordPress page, without the use of an API.
The plugin will display the following data, title, author, cover image and progress. The widget can link to the books and authors page on goodreads. It can display the content in two layouts, compact and long.
Please note that your profile has to be set to public.

Share Goodreads Update

Widget to give an overview of your currently reading books on goodreads, whitout the use of API.

WordPress Goodreads Bookshelf vs Share Goodreads Update