I could not have written Copperhead without Stephen W. Sears’s marvelous account of the Peninsular Campaign. Readers who want to know where the events in the novel coincide with the actuality of history could do no better than read Sears’s work.
Readers who would like to know the true story of the confrontation across the Rapidan and Rappahannock should read this splendid account of the campaign. This book was constantly at my elbow as I wrote Battle Flag.
For anyone wanting to know more about the battle of Antietam (or Sharpsburg, to southerners), the bloodiest day in all of American history, this is the book to read. To my mind, this is the finest book on a single Civil War battle ever written.