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Honorable Mention - Robert Macomber (Honor Series, Book 3)
Now in command of the steamer U.S.S. Hunt, Lt. Peter Wake quickly plunges into action, chasing a strange vessel during a tropical storm off Cuba, confronting death to liberate an escaping slave ship, and encountering the enemy's most powerful ocean warship in Havana's harbor. After the war he tracks down a colony of former Confederates in Puerto Rico.