Both Nafziger and Leggiere (his first book only covers the events leading up the battle of Brienne on 31st January 1814) have promised books on the campaign, but these show no signs of appearing any time soon. Perhaps this is one of the main reasons that the campaign is not that popular amongst wargamers.
In order to pull together the detailed information I needed for this campaign I have had to dig far wider and deeper than ever before. This digging has been surprisingly fruitful and rewarding and over the coming months I plan to share the results of this work so that other wargamers have access to the detail needed to game the battles and/or the campaign and add their own scenarios to this fascinating period of the Napoleonic wars.
I have added a resources page and will slowly update it with all the sources of information I have found so far and any others that I come across in the future. If you know of something that I have missed then please let me know.