Teggs's arch-enemy, General Loki, has stolen a time machine.
The astrosaurs trail him to Earth in the distant past, before the dinosaurs took of into space.
Soon they uncover a terrifying plot to murder millions and destroy history ...but can they stop it?
- Format: Paperback
- Pages: 336 pages, black and white
- Publisher: Random House Children's Publishers UK
- Publication Date: 29/09/2011
- Category: Adventure
- ISBN: 9781849414005