Breed, Novak Chase

Alex and Leslie Twisden lead charmed lives-fabulous jobs, a luxurious town house on Manhattans Upper East Side, a passionate marriage. What they dont have is a child, and as they try one infertility treatment after the next, yearning turns into obsession. As a last-ditch attempt to make their dream of parenthood come true, Alex and Leslie travel deep into Slovenia, where they submit to a painful and terrifying procedure that finally gives them what they so fervently desire . . . but with awful consequences.

Ten years later, cosseted and adored but living in a house of secrets, the twins Adam and Alice find themselves locked into their rooms every night, with sounds coming from their parents bedroom getting progressively louder, more violent, and more disturbing.