canadian mounties vs atomic invaders serial chapters 1 6

A foreign power, which is represented by their agent Marlof
attempts to set up secret missile bases in Canada to target the United States for their
planned summer invasion. Meanwhile, acting on intelligence following
the smashing of a spy ring in Montreal, Royal Canadian Mounted Police (RCMP)
officers Don Roberts and Kay Conway go undercover in a settling party
headed for the Yukon. Marlof also has agents, Beck and Reed, in the party en
route to the site of the planned missile bases