Thanks Tim. That seems to work.
Whilst it’s not the simplest of solutions for those not technically minded, the geek in me quite admires the template system you have implemented and the ability to utilise the backend data however we see fit.
I sorted it. It is a function of the custom post type within the plugin that allows the theme to control the comments.
In the file that creates the custom post type for the plugin, I changed
'supports' => array('title')
To
'supports' => array('title', 'comments')
I too am interested in how to enable comments on book pages as I currently can’t see how to do it.
I am using the 2013 theme and the latest version of MyBookTable.