Dictionary in Books not working anymore

Old question, same problem

I found that if you right-click or force click you get an option in the popup menu: "lookup selection" which opens up the dictionary as three finger does everywhere else.

In general Books app is very poor for shortcuts and unlike the Preview app you cannot use keyboard shortcuts to highlight or underline, worse still if you set one up in the settings app it won't work which makes you wonder why the Books app is in settings app for adding keyboard shortcuts if not planned to work? Common sense was gone when Steve Jobs departed!