Black Powder War by Naomi Novik

A British naval captain and his highly intelligent dragon travel to continental Europe seeking allies against Napoleon’s growing power, becoming entangled in the delicate politics of Prussia and Russia. As they negotiate with rival aerial corps and confront espionage, betrayal, and cultural misunderstandings, both must adapt to shifting loyalties and escalating military threats. The mission tests their partnership, exposes the darker side of alliance-building, and forces difficult choices about duty, identity, and the cost of war.

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