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Ethan was once human—an enlisted marine turned commissioned fleet officer who fought to protect Earth as it teetered on the brink of collapse. Now, he’s Sentinel-27, the quantum mind fused with the UNS Xenophon, an unmanned battlecruiser prowling the void. With no crew but maintenance bots and no orders but those he gives himself, Ethan has waged a relentless war against an alien enemy, striking convoys and shipyards with precision and fury.