In this follow-up to the internationally successful The Mapmakers' Race, the Santander children are drawn into a community's rebellion against a despot and use their mapping skills to avert an environmental scam.
Sal, Joe, Francie and Humphrey Santander are mapmakers looking for their father, a famous explorer who disappeared on his last expedition. Their search leads them to a curious new land and a township under siege. The all-powerful Grania Trading Company plans to uproot the people of Cruxcia and alter the landscape forever. The Santander's mapping skills may be the last chance for the Cruxcians to keep their homes. The land knows the truth... the maps will reveal it.