Hi @dhhoyle , one way to achieve this is to use custom fields. Look at this WordPress documentation on custom fields for how to add a custom field called, say, “chapter_order”. Then, you can set the appropriate value of the custom field for each chapter, and then use the following shortcode to get the proper ordering. Note that I’ve taken the example below from the plugin’s documentation and modified it a little according to your situation.
[display-posts meta_key="chapter_order" orderby="meta_value_num" order="ASC"]