How can Anna Ellis, a geeky, brilliant, and hopelessly smitten cosmetic chemist possibly win over Craig Kimball, the man of her dreamswho also happens to be her boss? The answer is Craigs empathetic (and handsome) CEO half brother, Marco. The makeup mogul knows Craig for the ridiculously competitive rival he is. Whatever Marco has, Craig wants. That can be Anna, if shes game to play. All Anna and Marco have to do is pretend theyre falling in love and let the rumors begin. If the experiment in attraction works, a jealous Craig will swoop in and give Anna her happily ever afterif it werent for one hitch in the plan. Theres more to Marco than meets the eye. With every fake date, Annas feelings are starting to become dizzyingly real. Blame it on chemistry. Its unpredictable, exciting, and occasionally combustible. If Anna and Marco are really falling in love, who are they to argue with science?