The Call to Duty: The Holy Flame Trilogy

Casey Carter, a probie in Engine Company 15, must prove herself a worthy member of this firefighting team. Life is a blend of the natural and spiritual, but can Casey keep them in balance? Can a mysterious group of men show Casey her true Call To Duty? "For we wrestle not against flesh and blood, but against principalities, against powers, against the rulers of the darkness of this world, against spiritual wickedness in high places."