Ten Ways to Make My Sister Disappear by Norma Fox Mazer

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.

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.