Earl's Irresistible Challenge by Lara Temple

Could this infamous rake... finally have found his countess?

When Lucas, Lord Sinclair, receives a mysterious summons from a Miss Olivia Silverdale, he's sceptical he can help her. But Olivia, although eccentric, is in earnest about her quest to restore her late godfather's reputation. Lucas's curiosity is piqued, and not just by Olivia's intelligent eyes and lithe form. A new challenge quickly presents itself: keeping Miss Silverdale at arm's length!