Almost Forever — Linda Howard

Claire Westerbrook couldn't believe it. She had met a man like no other, a man who might very well be the man. He was sexy, witty, charming - and a total imposter. He was Max Conroy, and he had a job to do.

His first interest wasn't in Claire; it was in the company where she worked. But this turned out to be a case of first things last, when the man who was all charm became charmed himself. Love was a new experience for Maxwell Benedict Conroy, but predictably, it was one he met head-on.