"The Civil War at Perryville: Battling for the Bluegrass" by Christopher L. Kolakowski

I wanted to mentioned the cool volume, "The Civil War at Perryville:  Battling for the Bluegrass" by Christopher L. Kolakowski which I picked up recently.

This is another nice little volume from History Press covering a specific moment in the Civil War.  I really like these books because they are just a good starting point for someone new to the Civil War, or just developing an interesting in a specific battle.
 

The author does a nice job of explaining how the battle gets set up....  Both the Union and the Confederacy are kind of hesitant to do much with Kentucky at first, as Kentucky tries to stay neutral.  Leonidas Polk (CSA) ends up being the guy to upset the balance, and kind of get things rolling in the blue grass state.

Kolakowski explains how things evolve (or devolve) from there.  Lots of action in Tennessee bleeds over to this conflict too.  Political manuvering in Frankfort and Bowling Green (nicely explained by the author) contribute to the conflict too.