Charlotte Guillain worked as a bookseller, an English teacher and an editor before becoming an author. She has written more than 100 books, both fiction and non-fiction. She always wanted to be a writer and her top tip is to read as much as you can. Chris Oxlade is an experienced author of non-fiction books for children. He has written more than 200 titles on science, technology, sports and hobbies, from encyclopedia articles to fun activity books.