Kirkus Reviews2014-05-21
Third in the series (The Long War, 2013, etc.) exploring the idea that alternate Earths exist and can be visited simply by "stepping" into them.The discovery of the Long Earth by folks with a natural ability to step, and its subsequent opening up to everybody by means of a simple device, resulted in a diaspora. The original Earth, known as Datum, still has its troubles, and this time, the supervolcano beneath Yellowstone explodes to catastrophic effect, hastening the dispersal of Datum's population. The building of airships equipped with rapid-step devices means various Earths thousands or millions of steps from Datum can be reached. U.S. Navy Cmdr. Maggie Kauffman receives a commission to explore beyond Earth 200 million and in the process discover what happened to a previous expedition that never returned.
