Ryan

Adds a shortcode, series-tag, that you can use to create a list of all posts 
that are tagged with whatever tag you pass in.
Series Tag was written to allow you to tag a series of posts with the same tag, 
and then easily link between them without having to manually create links at the 
bottom of each post.
Links are created in date published order starting at the earliest date. All post 
titles are links to the permalink of the post except for the current post which just has its title displayed.
For help or more info, visit <a href="http://www.nutt.net/tag/series-tag/" rel="nofollow ugc">Nutt.net</a>

Series Tag

Adds a shortcode so you can easily create a list of all posts with a specific tag. Written to make it easy to link between a series of posts.

Fumiki Takahashi

TAROSKY INC.

This plugin will..
<ol>
<li>Create a custom post type “Series”.</li>
<li>Add meta box to specified post types to be a part of the series.</li>
<li>Display TOC on post. You can change the settings in Theme Customizer or use “Series TOC” block.</li>
</ol>
<h4>Customization</h4>
Template Structure
To override look and feel, put template in your themes directory.
<pre>template-parts
- series
 - item.php // Each item in TOC.
 - list.php // TOC list which include item.php repeatedly.</pre>
Copy the template in plugin’s directoy and customize.
Archive Template
Archive page template of articles in series will be searched in your theme’s directory and loaded per the hierarchy below:
<pre>archive-in-series-{series-slug}.php
archive-in-series.php
archive.php
index.php</pre>
Hooks
Many hooks are also available. Search your plugin direcoty with <code>'taro_series_'</code> and you can find them easily 🙂
Functions
See <code>inludes/functions.php</code> and you can find useful template tags and functions.

Series Tag vs Taro Series