Problem 1: Murderous insurgents on the spaceship. Problem 2: Giant rocks hurtling through the skies. Just as well Perry and Fasool have rock-hopper Mardi to help them.
- ISBN13 9781407118598
- Publish Date 7 June 2010
- Publish Status Out of Print
- Out of Print 1 December 2020
- Publish Country GB
- Imprint Scholastic
- Format Paperback
- Pages 64
- Language English