The Woman From Lydia PB by Angela Hunt

Known to her neighbors as "the Lydian woman," Euodia seeks to make a fresh start by moving to the foreign city of Philippi. She finds new purpose after meeting Paulos, apostle to the Gentiles, who opens her eyes to helping those in need, particularly women and those who have been enslaved. 
 
Retired Roman soldier Hector has settled in Philippi with dreams of a future filled with wealth and status, pooling his army earnings with Lucius, his fellow comrade-in-arms turned business partner. 
 
His hopes are dashed, however, when Paulos robs their youngest enslaved girl of her lucrative ability to foretell the future, rendering her worthless to Hector's ambition. Determined to find someone to restore the girl's valuable "gift," Hector is willing to travel to the ends of the earth to do so. Following close behind him, Euodia and her servants embark on a journey to rescue Sabina and set her free forever.