Ivy Finnegan is an widely respected writer and editor of non-fiction for children and adults, specialising in puzzle and activity books. She has been compiling puzzles for more than 10 years. She lives in London, England.

Luke Seguin-Magee is an artist of children's books and comics. In the course of his career he has also designed, made graphics, illustrations and animations for computer games, websites and apps for a wide range of clients in Denmark, Canada and USA. He hails from Montreal, Canada, and now resides in Copenhagen and Stockholm. He studied fine art in Canada and multimedia design in Denmark. He is married with four children - ranging in age from 6 to 22.