The Nunaga Publishing Company was formed in 1972 by Rick Antonson, Brian Antonson and Mary Trainer upon the publication of a book they co-wrote, entitled "In Search of a Legend: Slumach’s Gold." Nunaga went on to publish books by other British Columbia authors, including "New Westminster: The Early Years" by Alan Woodland, "British Columbia Canoe Routes" by Canoe Sport BC, and "Highrise Horticulture: A Guide to Gardening in Small Spaces" by David Tarrant. Nunaga became a registered limited company in 1974. Rick Antonson was director and president, Mary Trainer was director and treasurer, and Brian Antonson was director and secretary. Nunaga purchased the rights to "Canadian Frontier Magazine" in 1974, and published the "Canadian Frontier Annual" from 1976-1978. The company’s Canadian sales representatives were McIntyre and Stanton in the West, and Belford Books in the East.

Nunaga changed its name to Antonson Publishing in 1977; that same year, Mary Trainer resigned as director. Under the name Antonson Publishing, the company continued to publish nonfiction books including "Vancouver Defended: History of the Men and Guns of the Lower Mainland Defences, 1859-1949" by Peter Moogk, and "Prison Doctor" by Guy Richmond. Over eight years, Nunaga/Antonson published twenty-five titles. In 1980, Antonson Publishing sold the rights to and backlist stock of its books to Douglas & McIntyre (D&M) and wound up its publishing activities. After the sale, Rick Antonson became Vice President and General Manager of Douglas & McIntyre. He left publishing to work in BC’s tourism industry in the mid-1980s, but remained a member of D&M’s board of directors into the mid-2000s.