Melissa Stewart is the author of more than 150 science books for children, including ten National Geographic Readers. Feathers: Not Just for Flying was an ALA Notable Book for Children, as well as a winner of the Cybils Award for Nonfiction and the Nerdy Book Club Award for Nonfiction. No Monkeys, No Chocolate was a Junior Library Guild selection, a Kirkus Reviews Best Books of 2013 pick, and a NSTA and CBC Outstanding Science Trade Book. Stewart is also the coauthor (with Nancy Chesley) of Perfect Pairs: Using Fiction & Nonfiction Picture Books to Teach Life Science, K–2.

Laura Marsh has worked in children's publishing for 20 years as an editor and currently as an author. She has written numerous books in the National Geographic Kids Readers series, including Sea Otters, Turtles, and Red Pandas. Marsh has also authored titles in the Mama Mirabelle series and the Toot & Puddle series.