What are the motifs in The Unlikely Spy by Daniel Silva?

Alienation is a recurring idea in the story. In the Unlikely Spy, the author's characters who are engaged in espionage have one trait in common. It is alienation. Their remoteness and distance from the world of emotions and common human compassion is critical to their success as secret agents. Murder, manipulation, deceit, and betrayal are conditions of normal life to the role of an espionage agent throughout history. Whether they are attempting to save their country, gain power or money, or personal satisfaction, a person who must constantly be on guard, in danger, watching, thinking, and preparing for impending disaster, cannot conduct their emotions and lifestyle like normal people.