"A World at Arms" by Gerhard L. Weinberg is a comprehensive academic book that is considered a masterpiece of historiography. It offers a global perspective on World War II and highlights the events that spanned six continents. The book begins with the changes that shaped Europe and its colonies after World War I and analyzes the actions of the Axis powers, the Allies, and neutral states in all theaters of war. Weinberg provides new insights into the interactions between the various fronts of the war and demonstrates how events in one part of the world influenced occurrences in another. In this new edition, which includes a new preface, "A World at Arms" remains a classic of global historiography and is essential for anyone looking to engage with the history of World War II.