Mercury Rising by Christine Rimmer

When it came to choosing the wrong man, Jane Elliott had written the book. So from now on, Jane had decided that when it came to untamable men, her policy was ‘hands-off.’ Only problem was, she hadn’t counted on how irresistible Cade Bravo’s hands would be — not to mention the rest of him...

As for Cade, gambler and bad boy extraordinaire, he always went after what he wanted — and he wanted Jane. And she wanted him, regardless of whether she thought it was sensible or not. Oh, he figured her head was saying no — but weren’t her heart and body screaming yes?