The White City — John Claude Bemis

In The Nine Pound Hammer, John Bemis introduced middle-grade readers to a whole new approach to epic fantasy, founded on characters and themes from American mythology and lore, including the legend of John Henry. Now in the third and final book, the heroes come together at the 1893 World's Fair in Chicago for a final confrontation with a businessman and tycoon who is in fact an ageless evil known as the Gog. With his Dark Machine, he intends to bend the world to his ruthless vision of progress and efficiency. It's man versus machine all over again, fighting for the soul of humanity in front of Ferris's Wheel. For fans of adventure fantasy like Percy Jackson and Peter and the Starcatchers.