Halloween Havoc (Sabrina the Teenage Witch #4)1997
by Diana G. Gallagher
When Sabrina's mischievous Aunt Vesta throws a real witch's party, Sabrina's rival, Libby, leaves her own tame halloween party to go it. She almost discovers the truth about Sabrina and blows her cover.
— from OpenLibrary
1 edition at OpenLibrary