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. She is the author of Wings, Lists for Curious Kids and This is Our World. She is also an editor, and commissioned and edited the Horrible Histories series for many years. She lives in Bath, UK, with Tom and their son, Toby.

Fatti Burke is an illustrator from Ireland who lives in Amsterdam. She has been working as a freelance illustrator since graduating in 2012. Her first three books (Irelandopedia; Historopedia; Focloiropedia) were bestsellers in Ireland. She also illustrated titles in an innovative board book series entitled I Look Up To..., which looks at influential women who have made a difference in the modern world. The information is delivered in baby-sized bites, and subjects include Ruth Bader Ginsburg, Michelle Obama, Malala Yousafzai and Serena Williams.