A Scandalous Vow — Ava Stone

A SPY NEVER REALLY RETIRES… Long ago, Marcus Gray, the Marquess of Haversham, left the Home Office with a blackened reputation and a determination to never look back. He skirted the edges of London society, caring for little other than himself, until he crossed paths with Caroline Staveley. When Marc discovers the recently widowed Caroline has returned to London and her late husband's actions have placed her in danger, he is quickly lured into the once familiar game of cat and mouse he thought he'd escaped. ...NOT WHEN THE LADY HE LOVES IS IN DANGER Caroline, Viscountess Staveley, is struggling to raise her children and find her place in the world now that her steady and reliable husband is gone. The last thing she needs is another complication, and that is exactly what the notorious skirt-chasing Haversham is -- a complicated, unapologetic rake that tempts her like no one ever has. As she starts to unravel his secrets, however, she begins to wonder who he really is and exactly how many secrets he's keeping.