Tracey Turner has written more than seventy books, most of them for children, on subjects including inventions, the universe, famous writers, rude words, and deadly perils. She is the author of Facts! One for Every Day and The Curious Book of Lists. Many of her books have sold foreign rights all over the world, and some have become bestsellers. She is also an editor, and commissioned and edited the Horrible Histories series for many years. She lives in Bath, UK, with Tom and their son, Toby. Aaron Cushley is an illustrator and doodler of dogs. From Belfast, he studied Illustration and Graphic design at the University Of Ulster Belfast School Of Art & Design. Aaron's work stems from his inner child and the innocence and creativity that emerges when he takes a pencil in his hand.