{% assign post_series = site.data.series %}{% assign series = '' %}{% for post in site.posts %}{% if post.url == page.url %}{% assign series = post.series %}{% endif %}{% endfor %}

<div class=“series_list”>

<h4>{{ series }}</h4>
<ol>{% for post in site.posts reversed %}{% if post.series == series %}  
        <li>{% if page.url == post.url %}{{post.title}}{% else %}<a href="{{post.url}}">{{post.title}}</a>{% endif %}</li>{% endif %}{% endfor %}  
</ol>

</div>

{% assign post_series = '' %}{% assign series = '' %}