While on the hunt for Zack's space ship, the "Risky Rascal," Zack, Effie, and Omega Chimp are thrown for a loop when they approach the planet Bounceback and find it missing from where it has always been. Original.
- Genre: Juvenile Fiction
- Subgenre: General, Science + Technology, Humorous Stories
- Age: 4-8 years
- Publisher: Aladdin
- Pages: 111
- Language: English
- Format: paperback
- Release Date: April 24, 2007
- Date Published: April 24, 2007
- Author: Brian Anderson
- Illustrator: Doug Holgate