Heart of Steel by Elizabeth Einspanier
When Alistair Mechanus first sees his captive, ER doctor Julia Parker, it is love at first sight – for him. Although he eagerly sets aside his plans for World Domination to woo her, ten years of solitude on Shark Reef Isle have left his social skills badly rusted. When his misguided act of kindness goes out of control, however, Julia must overcome her fear and place her trust in the mad genius. She has the skills to unlock his forgotten past – but discovering who he used to be might come at the cost of his remaining sanity.