1. Punitive War: Confederate Guerrillas and Union Reprisals by Clay Mountcastle (Univ. Press of Kansas, 2009).
A number of prominent Civil War historians of the guerrilla conflict have been high on Mountcastle's dissertation. Now, it's been published by UPK as a part of their excellent Modern War Studies series.
2. Captives in Gray: The Civil War Prisons of the Union by Roger Pickenpaugh (Univ. of Alabama Press, 2009).
I liked Pickenpaugh's earlier book Camp Chase and the Evolution of Union Prison Policy (Alabama, 2007), and now he's expanded his research to the Federal POW system in toto.
3. The Bonfire: The Siege and Burning of Atlanta by Marc Wortman (PublicAffairs, 2009).
The retail version of Russell Bonds's War Like the Thunderbolt: The Battle and Burning of Atlanta (the review will appear on or near the Sept. 2 release date) arrived in the mail the same day as this one. I've read the ARC of Bonds in its entirety but have yet to make anything of Bonfire.