Bloomsbury, the book's publishers are organising the event and they want schools to apply.
There is going to be a £5 charge per person, although Bloomsbury promise they're not trying to make any money, they just want to cover the cost.
The application form is on Bloomsbury's website, and the closing date is 16 May, so you don't have long.
But remember: ONLY schools can apply; you can't do it yourself! The winning schools will be picked at random from all the applications.