- The sparkling debut children"s novel from David Walliams, number one bestseller and fastest growing children"s author in the country. Dennis was different. Why was he different, you ask? Well, a small clue might be in the title of this book... Charming, surprising and hilarious - The Boy in the Dress is everything you would expect from the co-creator of Little Britain. David Walliams"s beautiful first novel will touch the hearts (and funny bones) of children and adults alike.