Nancy Castaldo has written children's books for over 20 years. Her research has taken her all over the world, from the Galápagos to Russia, and she loves sharing her adventures with her readers. She has conducted programs at the Boston Children's Museum, Atlanta Zoo, and Tennessee Aquarium, among others and has spoken at the Science Teachers Association of New York State, NCTE, Texas Library Association, and New England Society of Children's Book Writers & Illustrators.

Many of Nancy's books have received recognitions, including an American Bookseller Pick of the Lists, a Smithsonian Notable Book For Children, a NSTA Outstanding Science Trade title, Crystal Kite Awards, Green Earth Book Award, and Junior Library Guild Selections. In addition to these accolades, she was honored to be the recipient of the 2007 New York State Outdoor Education Association's Art and Literature Award for the body of her work.