Cornwell, Bernard. Copperhead. New York : HarperCollins, 1994.
Second in the Starbuck Chronicles series finds Nate Starbuck fighting at Ball's Bluff (and appropriating Oliver Wendell Holmes's coat). Nate becomes a double or triple agent in a complicated tangle of espionage during McClellan's 1862 Peninsula campaign against Richmond.
- Cornwell's own Starbuck Chronicles page
- The other Starbuck Chronicles novels: Rebel, Battle Flag, and The Bloody Ground.