Flameout

Flameout is set in Melbourne, Australia and is the third book in the Souls of Fire series by Keri Arthur. There is a plague in the city called the Crimson Death which turns people into a new sort of vampire/zombie type creature called Red Cloaks. Most of those infected become a part of a hive that is run by someone from Emberly Pearson's past--the brother of her former love Sam.