When a scientist learns that aliens in a parallel world are waging a secret war against the Earth, he disappears into the world and his children set out to find him.
- ISBN10 1596874805
- ISBN13 9781596874800
- Publish Date 17 December 2014 (first published 1 May 1989)
- Publish Status Active
- Out of Print 28 August 2023
- Publish Country US
- Publisher ibooks Inc
- Imprint Milk and Cookies Press
- Format Hardcover
- Pages 138
- Language English