Scott Bolinger

GTINs (Global Trade Item Numbers) including UPC, EAN, and ISBN are globally recognized unique identifiers for products.
They are required to list your product on Google and Amazon, this plugin allows you to add your GTIN and display it on your product page.
Supports:
<ul>
<li>Simple products</li>
<li>Variable products</li>
<li>Composite products</li>
<li>Product bundles</li>
</ul>
Features:
<ul>
<li>Add GTIN for main product</li>
<li>Add unique GTINs for product variations</li>
<li>Option to display GTIN on the single product page</li>
<li>Change GTIN to any other text</li>
<li>Add GTIN to structured product data</li>
<li>Works with product feeds like Google Shopping and more (requires a feed plugin)</li>
</ul>

WooCommerce UPC, EAN, and ISBN

Awesome plugin with great code

Add GTIN codes like UPC, EAN, and ISBN to your WooCommerce products.

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.

WooCommerce UPC, EAN, and ISBN vs GoodReviews