"The first book-length study of one of the Civil War's most outlandish and mysterious characters, Devil's Game traces the amazing career of Charles A. Dunham, double agent. Dunham was a spy, forger, "reptile journalist," and master of dirty tricks. Writing under different names for different newspapers, including New York's Tribune, Herald, and World, he routinely faked stories to promote the North's war aims, sometimes writing contradictory stories for rival papers. Dunham also used his journalism to create new identities and sometimes stepped into them, playing (with the help of his wife, Ophelia) at least a half-dozen such roles.".

"Dunham achieved his greatest infamy at the war's end. Called to testify in Washington, he was the most notorious of the witnesses who swore that Lincoln's assassination had been plotted by conspirators in Montreal and Toronto, on orders from Richmond. That testimony (later discredited but never officially challenged) helped lead to the execution of several alleged associates of John Wilkes Booth." "Dunham's postwar intrigues were almost as complex, as he continued to collect fake "evidence" of Southern war crimes. Finally convicted of perjury in these schemes, he worked in prison to produce evidence implicating President Andrew Johnson in the assassination, then reversed himself and sold out his associates to the President."