You’d have to pay me billions to work with a man like him… In my career as a gemologist, I’ve learned to spot the difference between a precious gem and a fake a mile away. I can also identify a self-important professor when I see one. The brilliant Dr. Ian Clark has everything going for him—irresistible good looks, billions of dollars, and head professor tenure at Columbia. But that doesn’t stop me from criticizing his research publicly. Only now the FBI wants me to team up with him because they need our expertise to help crack a series of international jewel heists. Dr. Clark makes it obvious his dislike is mutual, but with my reputation at New York’s Museum of Natural History on the line, I can’t say no. Especially as a single mother with twin girls to support. But then I start receiving anonymous threats about a mysterious rose diamond with links to my deceased mother’s past. With our lives in danger, I’d be foolish to trust Dr. Clark. But try telling that to my heart… Mr. Clark is a standalone book in the New York City Billionaires series with swoon-worthy romance, a gripping plot and guaranteed HEA ending!