From New York Times bestselling author Skye Warren comes a SMOKING HOT billionaire duet to immerse yourself in... Billionaire Christopher Bardot may lust after his step-sister, but he will never, ever act on it. He's too busy keeping her out of trouble. Until his business partner Sutton Mayfair meets her. He determines to charm that pretty dress off her, and Christopher sees red. This isn't a love triangle. Only two people are in love. This isn't a menage. Until the boundaries are pushed beyond bearing. This isn't a happy ending... Because someone will be left behind. Read the angsty and super sexy duet now! This collection contains SURVIVAL OF THE RICHEST and THE EVOLUTION OF MAN.