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.

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.

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.

Be warned! Awful animals lurk inside. These 10 tales of the world’s craziest creatures will have you shaking with laughter. You’ll never look at pets in the same way again! Marvel at Houdini, the magician’s rabbit. Take a trip around the world with Zoom, the supersonic tortoise. Gasp at the chaos created by Griselda, a grizzly bear with a big secret. And run for your lives! It’s Furp, the monstrous goldfish!

A story of prejudice and acceptance, funny lists and silly words, this new book has all the hallmarks of David’s previous best sellers. Our hero Ben is bored beyond belief after he is made to stay at his grandma’s house. She’s the boringest grandma ever: all she wants to do is to play Scrabble and eat cabbage soup. But there are two things Ben doesn’t know about his grandma.