My mother is a twin and my dad too. My mom’s twin married my dad’s twin and like my parents they had a gorgeous daughter a week after I was born. We might as well be twins too, we look like it, and then again, we pretty much have the same parents. We look the same, and yet we are so different, I am NYU’s Nerd Queen and she’s a Super Model. How’s that for different? Thing is, she disappeared just a week ago, and not wanting her hard-earned job to fall down the toilet guess who has to be Rebecca Joanne Carter; yeah, little old Ally Carter. And if that wasn’t enough, she’s engaged! . . . Help?