Lynn Morley and her best friend Marjorie Beasley (better known as Mouse) are convinced that Lynn`s elderly neighbor, Mrs. Tuggle, is a witch. The girls` curiosity turns to fear when they realize that Mrs. Tuggle has some sort of mind control over Lynn`s older sister, Judith, and seems to be drawing her into a witch`s coven. Could Mrs. Tuggle really be a witch, or are Lynn and Mouse`s beliefs just the result of what Lynn`s parents call her overactive imagination ? This is the first in a series of books about Lynn and Mouse`s struggle against Mrs. Tuggle. Other titles in the series are Witch Water , The Witch Herself , The Witch`s Eye , Witch Weed , and The Witch Returns .