The Case of the Invisible Witch: Poison Ivy Charm School Book One - Tapa blanda

Thirteen-year-old Tulip Bonnaire, Witch PI, runs Spells & Spies out of her dorm room at Poison Ivy Charm School, a school for polite witches and warlocks. She only has 72 hours to figure out her latest case, or her classmate Missy will never be seen again. The mean triplets who call themselves the Belles have cast an invisibility spell on Missy. If Tulip can't crack the case, Missy will remain invisible forever.