PRAISE FOR THE WORLD'S WORST SERIES:
This really is Walliams at his most indulgently gross and silly - the perfect combination for thousands of his loyal fans - Daily Mail
Laugh-out-loud funny and...downright disgusting - Daily Express
Often described as the modern-day Roald Dahl, Walliams is a big author with big ideas and plenty of illustrations, all combining to make for real page-turners, even for kids who would normally look at you as if you're mad to suggest reading for pleasure - The Independent