Kate Siber, author of the award-winning bestseller National Parks of the USA, is a journalist and a correspondent for Outside magazine living in Durango, Colorado. She has tried her hand at almost every adventure activity going, and covers the world's wild and remote places as well as environmental and social issues. Her writing has been featured in many publications, including National Geographic Traveler, National Parks, Preservation, Men's Journal, and The New York Times.

Lydia Hill is a freelance illustrator and 2D designer currently based in North London but originally from Portsmouth, England. She graduated from Middlesex University in 2019 with a First Class Degree in Illustration. Her clients include YES! Magazine, Wide Eyed Editions/Quarto Publishing, SkyTv, 33 seconds, The RAF, and Middlesex University. She usually works digitally and enjoys building up layers of color and texture to create a faux-traditional print look to her illustrations. She loves illustrating diverse characters using bold colors and shapes.