His Forbidden Obsession by Jessa Kane

Abandoned on the convent steps as a child, Sister Mercy has grown up within the stone walls of the church, under the watchful gazes of the nuns. On her father’s orders, she has been kept locked away from men, her beauty hidden beneath a habit and robe. When the nuns are forced to flee their convent, however, Private Griffin is tasked with protecting her from the other soldiers. But when his connection with the sweet, innocent nun is instant and electric, there is no way to protect himself against his growing, forbidden obsession…