I had a bit of a struggle getting the content I wanted out of Ghost. I even started writing my own Handlebars helper until I realised Ghost wouldn’t load it.
I found a solution by combining Ghost and Javascript. I did a short write-up of how I did it here: Ghost handlebars helpers + Javascript = secure filtering
I might have gone the long way around to get it working. So if you know a shortcut let me know.
James