This book reveals the captivating history of weaponized mail, offering the first complete exploration of this tumultuous phenomenon. Spanning two centuries, it uncovers the history of postal bombs, describing the evolution of both explosives and postal services that facilitated their deadly use. From an eighteenth-century incident involving Jonathan Swift to modern acts of terror by groups like the IRA and the Suffragettes, as well as lone perpetrators like the Unabomber, it uncovers the unexpected spread of bombs through mail. This chronological narrative carefully covers each decade, from early anarchists and world wars to the Cold War and the rise of the serial bomber. Incredible in its scope, this book sheds light on the psychopathic behavior, motivations, and political impacts behind murders via mail.