Book excerpt: An explosive, non-stop thriller following one man’s trail of violence across post-war Europe from the bestselling author of The Godfather. Michael Rogan was an intelligence officer behind enemy lines in World War II. But he made the mistake of falling in love, which gave him something to lose—or to be taken from him. Captured by the Nazis, Michael was treated as an experiment. A piece of meat. A subject upon which his captors committed atrocity upon atrocity. But not before they did the same to his wife—and unborn son. He's lived with the horror of that experience for ten years. Now, Michael Rogan has returned to Europe to find the men who tortured him. And he's going to make sure that they never have to live with the horror as he did...They will die with it. First published under a pseudonym in 1967, Six Graves to Munich was Mario Puzo’s literary predecessor to his legendary novel, The Godfather. In this unsung classic, Puzo’s trademark unflinchingly stark writing style, vivid descriptive skill, and relentless pace are exemplified in the genre of the spy novel. In his hands, the classic tale of revenge becomes a haunting study of humanity at its most visceral, offering a glimpse into a damaged soul whose only remaining purpose for living is to kill.