Catherine Barr worked at Greenpeace International for seven years as a wildlife and forestry campaigner and has a long-running interest in environmental issues. While working as an editor at the Natural History Museum, she researched and wrote two major summer exhibitions: Dinosaurs of the Gobi Desert and Myths and Monsters. Her previous books for Frances Lincoln Children's Books include The Story of Inventions, The Story of Life, and The Story of Climate Change. She lives on a hill near Hay-on-Wye in Herefordshire with her partner and two daughters.

Amy Husband studied Graphic Art at Liverpool School of Art. Her first picture book, Dear Miss, was winner of the Cambridgeshire Children's Picture Book Award in 2010, and she also wrote and illustrated Dear Santa, in the same series. Amy lives in the East Yorkshire countryside with her husband James, working from her home studio.