Joanne Ryder studied journalism at Marquette University. For several years she was an editor of children's books in New York, before she quit to write full-time. Ryder is an award-winning author whose books offer a unique blend of poetry and science. Her Just for a Day series invites children into the world of wild animals, ranging from a sea otter to Tyrannosaurus rex. Ryder's book, The Snailżs Spell, won a New York Academy of Sciences Book Award. She has been named three times in the annual list of Outstanding Science Trade Books for Children by a joint committee of the Childrenżs Book Council and the National Science Teachers Association.
Margie Moore has illustrated Stephanie S. Tolan's Bartholomew's Blessing. She and her family live on the New Jersey Shore.