Andy and Terry have a new book to write, but there's a problem. A BIG problem. Well, quite a few big problems actually.... On a hill not too far away there is a tree. And in that tree there is a tree house. And in that tree house there is a bowling alley, a see-through swimming pool, a tank full of sharks, a giant rope swing, a library full of comics, a secret underground laboratory, a vegetable vaporiser and a free marshmallow-dispensing machine.

Meet the Blunders: Bertie, Betsy, their children, Brutus and Bunny, along with their beloved grandma Old Lady Blunder, and their pet ostrich, Cedric. An ostrich is not a sensible pet, but then the Blunders are not sensible people. This family of upper-class twits live in a crumbling country house named Blunder Hall. When their home comes under threat, they must embark on a series of comic misadventures to save it.

The beloved World’s Worst series has captivated millions of readers. You’ve met the world’s worst children, the world’s worst parents, the world’s worst teachers and the world’s worst pets – but are you ready for the world’s worst monsters? If you don’t like ghosts, ogres, zombies, vampires, aliens, werewolves or mummies, DO NOT LISTEN TO THIS BOOK. Laugh along to these ten terrifying tales of marvellous monsters, brought to you by David Walliams.

Join Dave and his friends as they embark on an epic quest, full of action, adventure and jokes!

Millions of young listeners have loved the World's Worst Children tales. Now they will revel in this delightfully dreadful collection of the most gruesome grown-ups ever: The World's Worst Teachers. Think your teachers are bad? Wait till you meet this lot. These 10 tales of the world's most splendidly sinister teachers will have you running for the school gates. Dr Dread teaches science and is half man, half monster. Watch out for the ghastly Miss Seethe. She is always furious and she's on a detention rampage.