This book explores for the first time the literature of absolute war in connection to World War II. From a transnational and comparative standpoint, it addresses a set of theoretical, historical, and literary questions, shedding new light on the nature of absolute war, the literature on the world war of 1939-45, and modern war writing in general. It determines the main features of the language of absolute war, and how it gravitates around fundamental semantic clusters, such as the horror, terror, and the specter. The Literature of Absolute War studies the variegated responses given by literary authors to the extreme and seemingly unsolvable challenges posed by absolute war to epistemology, ethics, and language. It also delves into the different poetics that articulate the writing on absolute war, placing special emphasis on four literary practices: traditional realism, traumatic realism, the fantastic, and catastrophic modernism.