Gregor Craigie is a radio journalist and writer. He has worked for the Canadian Broadcasting Corporation for many years. Before that he worked in several cities, including London, England, where he was an announcer for the BBC World Service and a reporter for CBS Radio. Gregor's first book for adults, On Borrowed Time: North America's Next Big Quake, was a finalist for the Writers' Trust Balsillie Prize for Public Policy and the City of Victoria Butler Book Prize. He is also the author of Why Humans Build Up: The Rise of Temples, Towers and Skyscrapers and Walls: The Long History of Human Barriers and Why We Build Them, both part of the Orca Timeline series, as well as Saving Wolfgang, his children's fiction debut. Gregor lives in Victoria, British Columbia.

Bithi Sutradhar is a Bangladeshi illustrator and graphic designer who holds a Master of Publishing degree from Simon Fraser University, as well as an MFA and BFA in Graphic Design from the University of Dhaka. Alongside her professional illustration work, Bithi enjoys sharing her knowledge and skills through teaching. Her contributions have been recognized by educational institutions and government bodies such as the Ministry of Agriculture in Bangladesh. She is the illustrator of Allyship as Action and What a Waste both part of the Orca Take Action series. Bithi lives in Vancouver and loves exploring the vibrant outdoor scenes in her spare time, finding inspiration in the city's natural beauty.