While on a field trip to a local mine, Steve encounters the ghost of a slave named Caleb, and promises to help the spirit solve a decade's old mystery.
Provides information on fossil fuels, what they are, where they are found, and why they are important to managing natural resources and includes a case study that examines the implications for the environment.
Three children, transported to 1879, must solve a mystery involving Cornish folklore, magic, and the mining-era of the American West before they can return home.