Rory Mack Steele is a private investigator.
He is one of three working for the Highlander Investigative Services, a small family firm with offices in both New York (not sure if NYC or elsewhere in the state) and Toronto. Steele's side is the Canadian one but since his father is American and mother Canadian, both Steele and his younger sister, Skye, enjoy dual citizenship so working either side of the border is easy for them. Skye and their father make up the other two members of the firm.
Steele has been a private eye for a number of years. Prior to going to work in the family business he had served for a few years in the Royal Highland Regiment in the Canadian Army, an outfit nicknamed the Black Watch. He joined the military likely to help get over the pain of losing his wife to cancer. They had grown up together and married when they both turned 18; before two years had passed she was gone and he needed an outlet.
Steele tells the story of how he was always a short kid who had to fight a lot due to his size but a growth spurt in his very late teens changed that and now he enjoys a 6'2" athletic frame. So apparently does Skye, junior to him by three years. Both brother and sister also possess an impressive ability to handle themselves in close combat though I would put my money on Skye with her considerable training and expertise in several different martial arts.
The adventures of Rory Mack Steele are part of this compendium because he seems to excel in finding cases which either put him working with or in opposition to different spy organizations from various countries, starting with the very first recorded case in which an NSA analyst gets framed for an act of terrorism. A couple of more routine assignments follow and then a sequence of them arrive which will see Steele dealing with some very impressive international incidents.