<DIV>Ten years after WHEN SHE WAS GOOD launched Arthur A. Levine Books, Mazer brings us TEN WAYS TO MAKE MY SISTER DISAPPEAR, a humorous look at a blistering sister rivalry.<br><br>Everything ten year-old Sprig wants, her older sister Dakota already has. Everything Sprig does, Dakota does better. And anytime Sprig complains, Dakota just grins and calls her a baby. It's enough to make a kid wish her sister would disappear.<br><br>But in a year when Sprig's father is away, her favorite neighbor is ill, and the class bully is acting almost like, well, a boyfriend, Sprig discovers that allies come in unexpected shapes. Sometimes they're even related to you.<br></div>