Append one DjVu document to another

Appending one DjVu document to another is easy with djvm.exe, the DjVu multipage document manipulation utility. This can be found in the DjVuLibre package.

# Append back.djvu to front.djvu
djvm -i front.djvu back.djvu

Tried with: DjVuLibre 3.5.25.3