The hilarious childrens book from number one best-selling author David Walliams.

On a volcanic island, in the middle of shark-infested waters, stands the Cruel School. The lessons are appalling, the school dinners are revolting and the teachers are terrifying - especially the mysterious science teacher Doctor Doktur.

When Larker is sent to the school, she quickly realises something very odd is going on...something involving Doctor Doktur, a pair of strange spectacles, and a Monsterfication Machine. And, ultimately, she finds herself face-to-face with a real life Megamonster.

There seems to be no escape - but for Larker, nothing is impossible....