The Witch Herself — Phyllis Reynolds Naylor

When Lynn Morley's mother plans to move her writing studio into old Mrs. Tuggle's house for the winter, Lynn and her best friend, Mouse, are terrified for Mrs. Morley's safety--because Mrs. Tuggle is a witch. Lynn and Mouse are sure of that. But no one else is, and no one believes that Mrs. Tuggle is trying to turn others into witches to increase her power.

Can Lynn and Mouse save Mrs. Morley and destroy the witch's power before it destroys them?