Ten cautionary tales and a delightfully dreadful cast of characters from number one bestselling author David Walliams! Are you ready to meet the world's worst children? Five beastly boys and five gruesome girls! Like Sofia Sofa, a TV superfan so stuck to the sofa that she's turning into one! And Blubbering Bertha, a bawling big sister with a horrid habit of telling tales! From number one bestselling author David Walliams comes this collection of deliciously mischievous tales, illustrated throughout by artistic genius Tony Ross.