Heidi Heckelbeck In Disguise by Wanda Coven. Little Simon, 2012. 119 pages.

Heidi is upset that Mean Melanie, the class bully, plans to dress as an ugly stereotypical witch for Halloween. Even worse, she cannot tell her friends that it hurst even worse because Heidi IS a witch-- a good and lovely one whose mother will not let her use magic just because. So Heidi uses just a little magic without permission to dress up as Melanie for Halloween. Heidi loves that she gets Melanie's goat, but will she lose her friends when her "act" is so true to type?
Easy reader, very popular with 2nd and 3rd graders--its fun and pink and magic. also longer at  100+ pages, even with large type and the occasional drawing. Recommended by several young readers who love a series--and want them in order.