The Space Brigade & the Petrifying Problem with Princess Petronella by Moriarty

Princess Petronella is up to no good!
 
When she hatches a dirty plan to turn Planet Earth into an Inter-Galatic rubbish dump, something has to be done. 
 
To save Earth from this filthy fate, an Earthling Ambassador must be found to steer the spoilt brat from her odorous plan. Nicola Berry isn't a qualified Ambassador - in fact she's not even the bright. But the future of the little blue planet lies on her skinny shoulders. Can Nicola persuade Petronella to bin her disgusting idea before she turns Earth into a rubblish tip?
 
Suitable for ages 10-12 years old