Secret of the Copper Gear

Twelve-year-old Leo doesn't collect trading cards—he collects broken watches, old remote controls, and computer wires. But his knack for turning junk into genius is put to the ultimate test when he is sent to clear out his Great-Uncle Arthur's dusty attic.Hidden away in the darkest corner lies a mysterious brass-banded wooden chest without a keyhole. Driven by an interlocking gear puzzle and a cry...