10.12: Goliath (Leviathan Book 3), by Scott Westerfeld (2011 hardcover)

This is the final book of Westerfeld's Steampunk trilogy and it doesn't disappoint. The WWII-with-a-twist setting continues to fascinate, and this volume brings in additional historical figures from the United States and Mexico in addition to new Clanker and Darwinist contraptions that are sure to please. An added bonus is that Westerfeld continues a thin vein of romance to keep the girls reading, while not letting it overwhelm the plot as so many other (primarily female) teen authors do. You can read more details about the underlying premise in my review of the second book in the series, Behemoth, but be sure to start with Leviathan in order to grasp the underlying concepts--and the kick of of WWII.