Saving Earth means becoming its sentinel
Lieutenant Antel Ralnar expected a simple mission: protect the research team studying Earth before first contact can be considered. Posing as graduate student 'Andrew Rall' in Denver, he should have stayed invisible. But when he suddenly detects unauthorized signals suggesting a massive threat to Earth, his mission turns deadly. Then he falls for Rebecca Miller. Now Rebecca is starting to ask dangerous questions while Homeland Security begins investigating the 'researchers' with suspicious credentials, thereby threatening to expose the entire operation. With enemy forces closing in and his cover blown, Antel faces an impossible choice: follow orders or break his oath to save both the woman he loves and billions of lives. Military science fiction meets romance in Sentinel's Dilemma, where loyalty, love, and doing the right thing collide when the fate of the planet hangs in the balance.外文書商品之書封，為出版社提供之樣本。實際出貨商品，以出版社所提供之現有版本為主。部份書籍，因出版社供應狀況特殊，匯率將依實際狀況做調整。
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