Trenton Colman is a creative thirteen-year-old boy with a knack for all things mechanical. But his talents are viewed with suspicion in Cove, a steam-powered city built inside a mountain. In Cove, creativity is a crime and "invention" is a curse word.
Kallista Babbage is a repair technician and daughter of the notorious Leo Babbage, who died in an explosion--an event the leaders of Cove point to as an example of the danger of creativity.
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