When such feature will be made available, I suggest to ask the Calibre developers to add a reference to Zim, as an ePUB producer, along with Sigil (a Qt based ePUB editor), in the Calibre Quick Start Guide of John Schember.
When such feature will be made available, I suggest to ask the Calibre developers to add a reference to Zim, as an ePUB producer, along with Sigil (a Qt based ePUB editor), in the Calibre Quick Start Guide of John Schember.