Chris Hadfield is one of the world's most seasoned and accomplished astronauts, and is the author of the number one international bestseller, An Astronaut's Guide to Life on Earth, and You Are Here: Around the World in 92 Minutes . The Darkest Dark is Chris's first picture book. The top graduate of the U.S. Air Force Test Pilot School in 1988 and U.S. Navy test pilot of the year in 1991, Hadfield was selected by the Canadian Space Agency to be an astronaut in 1992. He was CAPCOM for 25 Shuttle launches and served as Director of NASA Operations in Star City, Russia, Chief of Robotics for the NASA Astronaut Office in Houston, and Chief of International Space Station Operations. Hadfield most recently served as Commander of the International Space Station where, while conducting a record-breaking number of scientific experiments and overseeing an emergency spacewalk, he gained worldwide acclaim for his breathtaking photographs and educational videos about life in space. His music video, a zero-gravity version of David Bowie's Space Oddity, has received more than 30 million views online. His TED talk, delivered in March 2014, has been viewed almost four million times and he judged the TV series Astronauts: Do You Have What It Takes?

Terry Fan received his formal art training at Ontario College of Art and Design in Toronto. His work is a blend of traditional and contemporary techniques, using ink or graphite mixed with digital. He spends his days (and nights) creating magical paintings, portraits and prints. Together with his brother Eric, he wrote and illustrated the critically-acclaimed picture book, The Night Gardener .

Eric Fan is an artist and writer who lives in Toronto, Canada. He attended the Ontario College of Art and Design where he studied illustration, sculpture and film. He has a passion for vintage bikes, clockwork contraptions and impossible dreams. His widely-praised debut picture book, The Night Gardener , was a collaboration with his brother Terry.