Ten Ways to Make My Sister Disappear by Norma Fox Mazer (author) (US edition)

Ever wanted to make an annoying sibling vanish? Sprig certainly has, and now she’s had enough of her older sister Dakota – always correcting Sprig, getting to talk to her dad first every time he calls, she’s even friends with that awful girl called Krystee! Sprig draws up a list of ways to deal with her: she could bake her into a cookie, or maybe even crunch her like a cucumber. It’s only when Sprig’s dad has to travel to a dangerous country that Sprig realises that maybe her sister isn’t that bad after all…