 It is the second book of the trilogy, and the sequel of "The Emerald Atlas".After the tumultuous events of last winter, protagonists Kate, Michael, and Emma long to continue the hunt for their missing parents.But they are soon discovered by their enemies, and a frantic chase sends Kate a hundred years into the past, where the various non-human sapients (Dwarves, Elves, Giants, Dragons, Trolls, etc.)