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.

cmeeren

This is a “set it and forget it” widget which allows you to display shelves and reading progress from your Goodreads profile. You can add multiple widgets and configure them individually to show multiple shelves.
Some configuration options:
<ul>
<li>Large/small cover images</li>
<li>Message to display if shelf is empty</li>
<li>Sort books by reading progress, date updated, shelf position, author, title, etc.</li>
<li>Number of books to display</li>
<li>Display your rating</li>
<li>Show first line of your Goodreads review (intended for quick notes such as “reading this together with Alice”, “recommended by Bob”, links to reviews, or whatever else strikes you fancy)</li>
<li>Show reading progress bar, progress text (no bar) or don’t show progress at all</li>
<li>Display time since last update (e.g. “2 days ago”)</li>
<li>Custom strings for time since last update (e.g. for quick and easy translating, or to change “2 days ago” to “2 floobargles since last update”)</li>
</ul>
Almost all HTML elements have dedicated CSS classes to allow you to easily override the style. The widget looks OK on the most popular WordPress themes.
Requires PHP 5.4 or later (PHP 7 supported).
The source is hosted on <a href="https://github.com/cmeeren/gr-progress" rel="nofollow ugc">GitHub</a>.

GR Progress Widget

Widget to display shelves and reading progress from Goodreads.

WordPress Goodreads Bookshelf vs GR Progress Widget