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. Many have become bestsellers. She is also an editor, and she worked on the Horrible Histories series for many years. She lives in Bath, UK, with Tom and their son, Toby.

Andrew Wightman is an illustrator who combines solid draughtsmanship with a sense of fun. He studied at Liverpool Art School and the Royal College of Art. His clients include The Guardian, Penguin, DK, Walker Books and Time Out.