Against the Tide of Years
S. M. Stirling
 As the series progresses, it becomes clear to Nantucket's government that sitting back and adopting isolationism will only profit those renegades who, under the leadership of ex-Coast Guard lieutenant William Walker (inspired directly by William Walker), have fled the island to exploit the Bronze Age peoples of Europe and the Middle East. Walker—who, unfortunately, is as smart as he is callous—exploits the "magic" of gunpowder, iron-forging, and the spinning jenny to build up an empire of his own, one that threatens to conquer the entire world unless the people of Nantucket build an army, a navy, and a web of foreign alliances to take the fight to Walker. Against the Tide of Years takes place approximately 10 years after the events of the first book. The leadership of the Republic of Nantucket has invested a great deal of time and effort into building up a substantial military force, both a deep-water navy and a Marine Corps, but the bulk of Nantucket's population are more interested in commerce and exploration than in bringing the renegade Walker to justice. A sneak attack on Nantucket itself by the nation of Tartessos, led by an ally of Walker, unites the factions of the Republic behind an all-out effort to topple Walker's growing empire, centered in Achaea (Greece), in a two-pronged campaign, attacking Tartessos and opening a second front in the Middle East (through an alliance with Babylon, Hittite Empire and Mitanni).