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, whose father died in an explosion--an event the leaders of Cove point to as an example of the danger of creativity.

Working together, Trenton and Kallista learn that Leo Babbage was developing a secret project before he perished. Following...

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, whose father died in an explosion--an event the leaders of Cove point to as an example of the danger of creativity.

Working together, Trenton and Kallista learn that Leo Babbage was developing a secret project before he perished. Following...

It's time to take the battle to the dragons.

In the third and final volume of the bestselling Mysteries of Cove series, Trenton and Kallista--along with their friends, Plucky, Simoni, Angus, and Clyde--fly their mechanical dragons south toward San Francisco, looking to rescue any survivors from the battle of Seattle.

Arriving in San Francisco and investigating the area in secret, the young riders are reunited with Kallista's father, Leo Babbage, who reveals that the humans in the city are working as slaves to the dragons, but that they don't want to be...