3D FlipBook - Automatically show TOC (Table of Contents) when page loads

Hi - I've added the ready function below to this document --- https://knowtion-inc.com/staging/natpro/products/ --- but it still doesn't auto show the TOC (a user has to click on the small bookmarks icon and we think users will not do that in some cases). How do we accomplish this?

$('body').FlipBook({
...,
ready: function(scene) {
scene.ctrl.cmdToc();
}
});