Yudhistira Mauris

This plugin helps you create a series of posts. It creates a new taxonomy named ‘series’ (can be modified via filter, see FAQ). There is no setting needed for this plugin. Once it is installed, assign posts you want to group as a series via post editor.
The plugin also creates a posts navigation on posts that belong to a certain series. See screenshots for the examples.

Easy Post Series

Works beautifully and doesn't have a sucking frontend design, as other similar plugins do!

Very good!

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.

Easy Post Series vs Taro Series