There is no "book" on Debian Packaging or Ubuntu Packaging that follows all the packaging policies for both, that is up to date, as there are changes frequently enough that you have to read the policies and the guides after they're updated. There's only the guides for Ubuntu or Debian. I had been looking for books for some time, but in fact there were none that were 'good' enough to meet what is needed here.
The Ubuntu Packaging Guide was modified since I first read it to use bzr
and version control systems (i.e. Ubuntu Distributed Development, or UDD) for packaging. That will be your best resource.
Ubuntu: Use the packaging guide link above. It touches upon using Bazaar (bzr
) and version control for packaging in Ubuntu, using the UDD process.
Debian: The Debian New Maintainers Guide may be a good start point. This does not use bzr for version controls, since that's an almost Ubuntu-specific thing.