The Unfortunates - The Unfortunate Series, #1

Nine.  She wasn't known by a name, only by the number carved into her skin at birth. Raised in an Unfortunate camp, she spent her days preparing for her eighteenth birthday, when she'd be sold to a Fortunate and forced to tend to their every need.  Gossip dictated the Sarios were the worst of the Fortunates, so when Nine found herself bought by the father of the Sario house, her dream of living a quiet, uneventful life of servitude shattered before her eyes.  Thrust into the dark clutches of the eldest son, Kaden Sario, Nine must navigate the treacherous world of high society and assist her Fortunate in his dream of new world domination