When his mother goes to the cellar and doesn't return right away, Harry goes down to search for her and confronts the terrible two-headed Whatzit.
- ISBN10 0590418203
- ISBN13 9780590418201
- Publish Date 1 January 1920
- Publish Status Out of Print
- Out of Print 21 June 2021
- Publish Country US
- Imprint Scholastic
- Format Paperback (US Trade)
- Language English