When lightning strikes by kristin hannah
During a magical storm, romance writer Alaina Costanza is hurled back in time, into the Western world of her latest novel. There she is kidnapped by her own character, a ruthless outlaw known only as Killian. Thrown together by fate, Alaina and Killian will discover a love too magnificent to last a single lifetime. But even magic has a price, and time is running out. For the sake of Alaina's child, they must risk it all and fight for a future than depends on lightning striking . . . twice.-goodreads