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.

Kemory Grubb

The GoodReviews plugin displays information about a specific title from Goodreads, including reader reviews. This plugin was developed mainly for authors or booksellers who want to showcase Goodreads information about specific titles on their WordPress sites. You must obtain a Goodreads API developer key in order to use this plugin. You can obain an API key by following the instructions at goodreads.com/api. This plugin was developed by a third party who is not affiliated with Goodreads.
Features:
<ul>
<li>Uses a shortcode to display Goodreads reviews and book information for a specific ISBN or Goodreads.com ID in any page or post.</li>
<li>Returns book information in divs and reviews in an iframe that can be styled manually from the shortcode, via custom CSS, or via a built-in responsive style sheet.</li>
<li>Includes three separate widgets that can be used in place of the shortcode.</li>
<li>Supports WordPress localization (i18n)</li>
<li>Uses WordPress 3.8 and later Dashicons to display average ratings.</li>
</ul>

GoodReviews

Display Goodreads.com reviews for ISBNs or IDs you specify on any page or post.

WordPress Goodreads Bookshelf vs GoodReviews