Eileen Cameron has hiked and extensively explored the canyonlands of the American West. She lives and works from her home in Morristown, New Jersey. Canyon is her first children's book.

Michael Collier has been a freelance writer and photographer since the 1970s. He has a Masters Degree in Structural Geology from Stanford University and pilots his own Cessna 180.

Collier's photographs and articles have appeared in dozens of books, as well as major magazines and newspapers. He has written scripts for two documentary films about the Grand Canyon. He was a special projects writer for the U.S. Geological Survey and has written and photographed fourteen books on geological themes.

Michael Collier has won the National Park Service Director's Award, the National Outdoor Book Award, and the U.S. Geological Survey's Shoemaker Communications Award. In 2005, he was named winner of the American Geological Institute's Award for Outstanding Contribution to the Public Understanding of the Geosciences.

Michael Collier lives in Flagstaff, Arizona with his wife, Rose Houk, who is also a writer. Michael is the author and photographer for Over The Rivers, Over the Coasts, Over the Mountains, and the app Wonders of Geology. He is also the photographer for Canyon.