The Mustard twins disgust the town with their raucous burps but when aliens invade they are the only ones with a plan to save the world.
A revolting, rhyming tale in the spirit of Roald Dahl and Horrid Henry.
- Format: Paperback
- Pages: 32 pages, full colour
- Publisher: Simon & Schuster Ltd
- Publication Date: 13/08/2015
- Category: Picture storybooks
- ISBN: 9781471124792