The last book in Anna Hackett’s “Eon Warriors” series is titled “King of Eon.” It centers on King Gayel Solann-Eon, who wants to bolster his bond with Earth by getting married to a Terran. But he can’t help but be drawn to Captain Alea Rodriguez, the man in charge of his prospective brides’ safety. They battle alongside one another in the face of the Kantos’ cunning attacks, forging an unbreakable friendship.