jellybooks

This is a plugin that simplifies the integration of the Jellybooks DISCOVERY service API, and embeds interactive book samples within product pages on a WordPress site:
<ol>
<li>It connects to the Jellybooks DISCOVERY API to retrieve book samples for a given ISBN.</li>
<li>It automatically adds interactive book samples to your book product pages via our excerpts.js library.</li>
</ol>
Note: For the avoidance of doubt, admins must have a valid Jellybooks DISCOVERY account and API key to use this plugin.
For further information about the API: https://www.jellybooks.com/apis/excerpts/index.html 
For further information about the excerpts.js library: https://www.jellybooks.com/apis/excerpt_integration/index.html. That page also explains some of the various options that are configurable in the plugin admin interface.
<h3>Source code</h3>
The plugin can be downloaded and its source code can be viewed and modified (as per Open Source license). The plugin also contains Jellybooks’ <a href="https://github.com/Jellybooks/excerpts-js" rel="nofollow ugc">excerpts.js library</a> in a minified form for improved performance.
A non-minified version is included within the assets directory. The full source code for the excerpts.js JavaScript and CSS files can be found in the <a href="https://github.com/Jellybooks/excerpts-js" rel="nofollow ugc"><code>excerpts.js</code> repository</a>.

Jellybooks DISCOVERY for Publishers

The Jellybooks DISCOVERY for Publishers plugin adds instant book samples to your book product pages.

david.kane

The <a href="https://www.supadu.com/" rel="nofollow ugc">Supafolio WordPress plugin</a> allows trade publishers to access powerful features through WordPress previously only available to Supacms users which can be easily embedded in your pages using shortcodes.
Features include:
<ul>
<li>Metadata. Display the metadata (e.g. ONIX) for any book in your catalog, including cover image, title, subtitle, author, price, format and link by typing in the ISBN13.</li>
<li>Layouts. Choose how to display your books through a variety of layouts including grid, carousel and list.</li>
<li>Control. Change the metadata that is displayed on the page by overwriting the underlying data through the SupaFolio dashboard.</li>
</ul>

Supafolio

Quickly and easily connect your book metadata (ONIX) to your WordPress site.

Jellybooks DISCOVERY for Publishers vs Supafolio