ISBN-13: 9781438236094 / Angielski / Miękka / 2008 / 188 str.
In a heart racing tale, written for teens and tweens, two sisters travel across the ice covered world by any means necessary in a desperate attempt to recover their kidnapped mother. She holds the key to the recovery and survival of the human race. Before that can be accomplished however her two daughters need to get her back from profiteers who do not know her true value.