Zack Freeman woke out of a deep sleep to see his butt perched on the ledge of his bedroom window. 'No!' He yelled. 'Come back!' But it was too late. His butt jumped out of the window and landed with a soft thud in the garden bed below. Zack stared at the window and sighed. 'Oh no,' he said, 'Not again.'

So begins the story of a boy and his crazy runaway butt. A story so sensational, so stinky and so stupid it has to be read to be believed ... if you dare!

THE DAY MY BUTT WENT PSYCHO: A STORY (AND NOW A MAJOR CARTOON SERIES) THAT YOU - AND YOUR BUTT - WILL NEVER FORGET!

Originally published as The Day My Bum Went Psycho!