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

{{ series }}

    {% for post in site.posts reversed %}{% if post.series == series %}
  1. {% if page.url == post.url %}{{post.title}}{% else %}{{post.title}}{% endif %}
  2. {% endif %}{% endfor %}
{% assign post_series = '' %}{% assign series = '' %}