Scourge of War Boards

I also recommend Journal of the Waterloo campaign, by General Cavalié Mercer, you can download here

The Recollections of Rifleman Harris, Benjamin Randell HARRIS (1781 - 1858) and Henry CURLING (1803 - 1864)

Available as a free audiobook on librivox

People's memoirs and dairies and such while fascinating don't really give that much helpful information. Mercer's account of Waterloo is a fantastic description of what SoW plays like under HITS but it doesn't give you much else. General histories of campaigns are best for this, the more modern the better, also tactical books such as the superb Nafziger title Lecrop mentioned. There are also many excellent uniform and organisational guides out there, especially Osprey's Men at Arms series.

Google is also excellent, you can find troves of treasure on uniform pictures, battle maps, orders of battle with just an evenings surfing.

George Nafziger's Orders of Battle resource:

http://cdm16040.contentdm.oclc.org/cdm/ ... 11/id/1277

A good source for all kinds of things is the Total War Center forum for mods to Total War:Napoleon. Those guys are doing research just like we are:

http://www.twcenter.net/forums/forumdis ... rch-Center

And:

http://www.twcenter.net/forums/showthre ... ntings-etc

Some bargains here -- prices look cheaper than Amazon:

http://books.national-army-museum.ac.uk ... c-306.html