The Only Light Left Burning - Erik J Brown - Bog

"After a long and treacherous journey south, Andrew and Jamie have finally found safety in the Florida Keys. Settling into life in the Islamorada colony with other survivors of [a superflu that killed most of the world's population], they've finally found themselves a home, even a family. But anxious Jamie is less comfortable in their new community and is eager to return north to keep the promise they made to their friend Henri--to bring her to the colony and reunite her with her daughter. Besides, would it really be so bad to find someplace just for the two of them?"--