{% 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 %}
{% if page.url == post.url %}{{post.title}}{% else %}{{post.title}}{% endif %}