- Images: list available images, replace existing image, easier
- For example: +value:book.figures|target=/book+
- Replacing existing images is possible by uploading a new image.
- Easier than what?
- Navigation: next/previous page arrow icons in the header, show/hide
TOC on the side
This is all doable by changing the template (environment) of your book.
- Chapters: maybe some sort of drag-drop using the TOC?
If somebody implements this I would be happy to integrate.