Loss of Reason (State of Reason Mystery, Book 1)

Distant for many years, Franklin out of Pennsylvania and his step-brother Everon out of Nevada are connected by a single link: Their sister Cynthia. A nuclear bomb is detonated in New York. Banker, wife, mother, Cynthia lives in New York. The military has quarantined the city. All bridges and tunnels have been destroyed or blocked. Easterly winds have forced the huge radiation cloud out over Long Island. But the wind is about to change. Franklin climbs mountains. Everon can fly anything. And Cynthia's brothers are determined to find her. If it were your sister, what would you do?