Hellion at Heart by Tamara Gill

Sifting through the sands in the Middle East while learning of ancient cultures and buried civilizations is all Miss Hallie Evans dreams about. But when an impending scandal forces her back to England, her hopes and dreams are destroyed. Now, as a hired archaeologist for the rich, Hallie explores and studies the ancient ruins excavated on their properties.
The Viscount of Duncannon, Arthur Howard, was beguiled after a chance encounter with Miss Hallie Evans several years ago. She left an impression on him that never faded. But when their paths cross again, Arthur is determined to win Hallie’s heart this time around–at all costs.
But as Hallie’s buried secrets begin to surface, neither can stop society from unearthing the truth. Now, Arthur must choose between love and family duty. Can Hallie cease those who threaten her livelihood for a real chance at true love?