A Moon Girl Stole My Friend by Rebecca Patterson
It's 2099. Lyla lives in a world of robocats, flying sweets and instant snow, but some things never change. Little brothers are still annoying, school teachers make you cringe, and, when your best friend deserts you for the new girl, it still HURTS. Especially when that new girl is from the Moon. But Lyla's problems lead her into unexpected adventures . . .