Author, traveller and adventurer, Simon Chapman has been entertaining young people with books on such diverse subjects as dinosaurs, rivers, extreme natural environments and even alien invasions for over 20 years, including in his Blue Peter award-winning Explorers Wanted series, which he also illustrated. An experienced Physics teacher, Simon is now taking readers on a brand-new adventure, creating a children's guide to Einstein's theory of relativity, produced in collaboration with the University of Cambridge.

Wenjia Tang graduated from the Maryland Institute College of Art, USA, in 2017. After working in New York City, she returned to China in 2020 and lives in Nanjing with her parents. Wenjia loves illustrating non-fiction picture books and her work has been recognised by American Illustration, the Society of Illustrators, and Communication Arts.