New York: RoC, (2011) dj. Hardcover first edition - Alternate history set 10,000 years ago. "Fourteen-year-old Ana calls Northland home, but her world is changing. The air is warming, the ice is melting, and the seas are rising. Then Ana meets a traveler from a far-distant city called Jericho-a city that is protected by a wall. And she starts to imagine the impossible..." and so begins the building of a wall that will take decades and span hundreds of miles, and change the history of the world. The third volume in the Northland trilogy. Map, author's afterword. 499 pp. ISBN: 978-0451464187.