Catherine Barr is the author of more than twenty nonfiction books for young readers, including Let's Save the Amazon, illustrated by Jean Claude, and Fourteen Wolves, illustrated by Jenni Desmond. She campaigned with Greenpeace to protect endangered species for several years before becoming a children's book author, and many of her books address conservation themes. Catherine Barr lives in England with her partner and two daughters.

Christiane Engel is an internationally acclaimed illustrator and author-illustrator of more than fifty children's books, including Age of the Dinosaurs and Stars and Space. She lives by the sea in southeast England with her family.