When sharing via the Twitter button when social sharing is enabled or just copying/pasting the book URL into a social platform, there is no preview image (book cover) included in the post. It is just text.
Is there a plugin or option that will direct social platforms to utilize the book cover image as a preview?
Somewhat related observation… it appears that Pressbooks now only supports Twitter as an option for social sharing (no Facebook icon appears when social sharing option is enabled). In addition to Facebook, it might be nice to have an Instagram share option to take advantage of the sizeable “bookstagram” community.