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…

David Walliams has taken the children’s literary world by storm Since 2008. His most recent book RATBURGER,immediately went to no.1 in the children’s chart, while the PB of his previous title, GANGSTA GRANNY, currently dominates the UK charts and has sold over 100,000 PBs on top of 370,000+ HBs and 36,000 ebooks (Bookscan July 2013). Today, David is the fastest growing Children’s author in the UK. His books have been translated into 30+ languages and sold over 2 million copies in the UK alone.