Margo and Craig's new baby sitter Mrs. Tooey turns out to be a witch, who enlists their aid in fighting her evil sister Velma's scheme to destroy Summerton.
- ISBN10 0064403130
- ISBN13 9780064403139
- Publish Date 1 February 1990 (first published 1 January 1988)
- Publish Status Out of Print
- Out of Print 9 March 2011
- Publish Country US
- Publisher HarperCollins Publishers
- Imprint Collins
- Format Paperback (US Trade)
- Language English