Dark Domination by Lili Valente is the first book in her Bought by the Billionaire four-part serial. 
 Allow me to preface my review by saying that Jackson can mistake my identity any day! Phew - A wicked hot start to the series. A dark, erotic joining between Jackson and the woman he believes to be Harley ends with it being the best night of her twin sister Hannah's life and the moment where Jackson truly feels like Harley is his. 
 Six years later - Harley is dead and Hannah is back. Jackson didn't realize back then that he had the wrong twin but he takes his opportunity for revenge when he sees Hannah (who he believes is Harley) and then it gets REALLY interesting. A fantastic start to this wickedly steamy series.