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"Invasion and migration" is a category for books that center on large-scale movements of people or groups—whether as aggressive incursions, colonization, refugee flows, mass migrations, or speculative alien invasions—and the social, political and personal consequences that follow. These works explore causes (war, climate change, conquest, economic collapse), the journey and logistics of movement, and the fraught encounters between newcomers and established populations, examining themes of survival, identity, power, displacement, assimilation, resistance and prejudice. The category spans nonfiction reportage and history as well as fiction—historical epics, contemporary realism, dystopian and post‑apocalyptic tales, and science fiction or fantasy—and ranges in tone from intimate character studies to sweeping, geopolitical narratives. At its heart, "Invasion and migration" interrogates how communities and individuals adapt, clash, and transform when borders and lives are upended.

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