Dave Eggers was born in Boston in 1970. He is the author of A Heartbreaking Work of Staggering Genius, You Shall Know Our Velocity, The Unforbidden is Compulsory, How We Are Hungry, Short Short Stories, Teachers Have It Easy, Surviving Justice, What is the What, How the Water Feels to the Fishes, The Wild Things, Zeitoun, A Hologram for the King, The Circle and Your Fathers, Where Are They? And The Prophets, Do They Live Forever?

A Hologram for the King and The Circle are both currently in production for major film adaptations. Dave Eggers is the founder of McSweeney's independent publishing house, the 826 National network, and the nonprofit organisation ScholarMatch. He lives in Northern California with his family and Heroes of the Frontier is his seventh novel.

Mark Hoffmann is a children's book illustrator, fine artist and professor at Montserrat College of Art in the illustration department.

Hawks Kettle, Puffins Wheel is his third book for children. Originally from Minnesota, he now lives with his family outside Boston, Massachusetts.