Reality TV can get pretty ugly—post-rose-ceremony mascara tears, anyone? But in the latest thriller from Jessica Knoll, author of Luckiest Girl Alive, it’s downright twisted. Brett and Kelly are Type A sisters competing to be the next top entrepreneur on a show called Goal Diggers—until Brett, the fan fave, turns up dead. This is a delicious nail-biter but also a serious commentary on pop culture’s annoying penchant for playing women against one another.