Dan Green has an MA in Natural Sciences from Cambridge University and has written over 35 books for children, including the Basher Science series, which has sold over 2 million copies around the world. He lives in London. www.dangreenbooks.com Sean Sims is a talented and successful designer and illustrator whose clients have included the BBC, The Guardian, The Sunday Times, Virgin and Vodafone. He lives in Brighton. https://seansims.carbonmade.com