The close of the Survival Trilogy. Brooke's trek north ends where the last book was heading: a walled city hidden deep in Canada, with heat, food, clean clothes and a bed — everything the arenas of ruined America were not. Rice spends the book asking what that costs. Brooke trains under a new mentor, is fought over by the city's survivors, and then hears that people are still fighting underground in the States to take the country back, her father possibly among them — which turns safety into a choice rather than an ending.
Summary by Loreful, from public sources