Peter can't wait to join his parents on an expedition to the ice caps of Greenland to study global warming. But while he's there, he begins to suspect there might be another reason for this trip other than scientific research.
And in another world, there is Thea, who lives with her family under the ice, and is desperate to see what's above it.
When Thea and Peter meet, two worlds will collide, and a host of secrets will be released.
Rebecca Stead grew up in New York City where she lives today with her husband and two sons. Rebecca used to be a lawyer and wrote books for adults before turning to younger fiction. Her second book for children, When You Reach Me, won the Newbery Medal 2010, and her follow-up, Liar and Spy, was the winner of the Guardian Children's Fiction Prize. She now combines her writing with work as a literary agent