"An exciting, engaging mix of science fiction, mystery, and adventure." -School Library Journal

Two kids. Two worlds. One secret.

Peter is thrilled to join his parents on an expedition to Greenland, where his father studies global warming. Peter will get to skip school, drive a dogsled, and–finally–share in his dad’s adventures. But on the ice cap, Peter struggles to understand a series of visions that both frighten and entice him.

Thea has never seen the sun. Her extraordinary people, suspected of witchcraft and nearly driven to extinction, have retreated to a secret world they’ve built deep inside the arctic ice. As Thea dreams of a path to Earth’s surface, Peter’s search for answers brings him ever closer to her hidden home.

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A Junior Library Guild selection
A Book Sense Pick for Children
A New York Public Library Book for the Teen Age
An IRA Notable Book