One of the things I did with my RST file was to include a cover image, like this:
.. meta::
:PG.Id: 9999
:PG.Title: A Study of the Bhagavata Purana
:PG.Rights: Public Domain
:PG.Producer: Bhakta Jim
:PG.Credits: This file was produced from page images at the Internet Archive.
:DC.Creator: Purnendu Narayana Sinha
:DC.Title: A Study of the Bhagavata Purana or Esoteric Hinduism
:DC.Language: en
:DC.Created: 1901
:coverpage: images/bhagap_cover.png
There really is a bhagap_cover.png file in my images directory. However, the file does not get included in the EPUB archive. I do not refer to this file anywhere in the HTML. I definitely include it in the zip file I upload.
James Simmons