The book takes a narrative non-fiction approach, blending historical accuracy with compelling storytelling, ensuring complex military concepts are accessible to a broad audience. Beginning with the early challenges of U-boat commanders in World War I, it progresses through key historical periods like World War II and the Cold War, examining technological leaps and strategic shifts. Each chapter focuses on specific battles and advancements, culminating in an analysis of the current state of submarine warfare and its potential future, including ethical implications.