Who Needs a Stepsister — Patricia Aks

Laurie doesn't know what to expect the first time she meets her stepsister but she sure doesn't expect Diana. Beautiful and cool, Diana is as different from Laurie as anyone could possibly be. They don't fight, though.Not at first. But Diana doesn't fit in with Laurie and her friends…and Laurie doesn't fit in with Diana's new crowd. Soon the trouble begins. Diana causes problems between Laurie and her friends, Laurie and her father, and worst of all Laurie and Kevin…

It wouldn't be so bad if she and Diana weren't living under the same roof. But Laurie knows that somehow, somehow she and Diana must work things out.