Christopher Lloyd graduated with a first-class degree in history from Cambridge University. He began his career as a journalist with The Sunday Times newspaper, before setting out to write books. After his adult world history book, What on Earth Happened?, Christopher turned his attention to children's books. He is the author of the children's non-fiction book Absolutely Everything! and the adult non-fiction book What on Earth Happened!, and the editor of the international bestseller Britannica All New Children's Encyclopedia. Together, his books have sold more than 1.5 million copies worldwide.

Andy Forshaw graduated in graphic design and illustration from London's Central Saint Martins college, and has worked on numerous online and publishing projects. Since 2010, Andy has created more than 5,000 illustrations for children's books. When not illustrating, Andy can be found exploring the countryside on his bike. He lives in London.