"Murder by Mail is a fascinating and well-researched account of a deadly tactic used by terrorists, criminals, and others throughout history. Roth and Cengiz have uncovered long-forgotten cases from around the world where various individuals and groups have used letter and package bombs to kill and maim their victims. An impressive book that sheds light on an important topic."–Jeffrey D. Simon, author of "The Bulldog Detective: William J. Flynn and America's First War against the Mafia, Spies, and Terrorists"