Clive Gifford has traveled to more than 70 countries, climbed rocket launch towers, ridden on robots, and flown gliders. He's had more than 200 books published and has received nominations for or won Royal Society, School Library Association, Smithsonian, and TES awards. He won the Blue Peter Book Award for Best Book with Facts 2019 for his title The Colors of History (QEB). Clive lives in Manchester, UK. 

Yiffy Gu is passionate about creating beautiful color palettes, unique textures, and illustrating using a variety of elements. She defines her style as youthful and whimsical, and her illustrations and motion graphics reach a wide audience. Yiffy enjoys the hustle and bustle of big cities, and inspired by the diversity of people. She is constantly experimenting with new things, which is reflected in her art.