'That's the one!' she cried. 'That's the bottom I'm after. Darling, you have the most gorgeous bottom!'

Nicholas's dad has a plan to make some fast cash. Nappies! Some disposable-nappy people are looking for a beautiful botty for their new advert - and all Nicholas's baby brother has to do is pass the audition. What could possibly go wrong?

Jeremy Strong used to be a primary-school headteacher before he became a full-time writer. He won the Children's Book Award with The Hundred-Mile-an-Hour Dog and is immensely popular with children. He lives in Somerset.