Each of these stories touches on the idea of a twin, ghostly double of a live person, or a secret self.
- ISBN10 0606135723
- ISBN13 9780606135726
- Publish Date 1 July 1998 (first published 7 April 1997)
- Publish Status Out of Print
- Out of Print 1 July 2021
- Publish Country US
- Imprint Turtleback Books
- Edition Turtleback School & Library ed.
- Format Hardcover (Library Binding)
- Pages 298
- Language English